Beta

ModelsExpand Collapse

AnthropicBeta = string or "message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 16 more

Accepts one of the following:

UnionMember0 = string

UnionMember1 = "message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 16 more

Accepts one of the following:

"message-batches-2024-09-24"

"prompt-caching-2024-07-31"

"computer-use-2024-10-22"

"computer-use-2025-01-24"

"pdfs-2024-09-25"

"token-counting-2024-11-01"

"token-efficient-tools-2025-02-19"

"output-128k-2025-02-19"

"files-api-2025-04-14"

"mcp-client-2025-04-04"

"mcp-client-2025-11-20"

"dev-full-thinking-2025-05-14"

"interleaved-thinking-2025-05-14"

"code-execution-2025-05-22"

"extended-cache-ttl-2025-04-11"

"context-1m-2025-08-07"

"context-management-2025-06-27"

"model-context-window-exceeded-2025-08-26"

"skills-2025-10-02"

BetaAPIError = object { message, type }

message: string

type: "api_error"

Accepts one of the following:

"api_error"

BetaAuthenticationError = object { message, type }

message: string

type: "authentication_error"

Accepts one of the following:

"authentication_error"

BetaBillingError = object { message, type }

message: string

type: "billing_error"

Accepts one of the following:

"billing_error"

BetaError = BetaInvalidRequestError { message, type } or BetaAuthenticationError { message, type } or BetaBillingError { message, type } or 6 more

Accepts one of the following:

BetaInvalidRequestError = object { message, type }

message: string

type: "invalid_request_error"

Accepts one of the following:

"invalid_request_error"

BetaAuthenticationError = object { message, type }

message: string

type: "authentication_error"

Accepts one of the following:

"authentication_error"

BetaBillingError = object { message, type }

message: string

type: "billing_error"

Accepts one of the following:

"billing_error"

BetaPermissionError = object { message, type }

message: string

type: "permission_error"

Accepts one of the following:

"permission_error"

BetaNotFoundError = object { message, type }

message: string

type: "not_found_error"

Accepts one of the following:

"not_found_error"

BetaRateLimitError = object { message, type }

message: string

type: "rate_limit_error"

Accepts one of the following:

"rate_limit_error"

BetaGatewayTimeoutError = object { message, type }

message: string

type: "timeout_error"

Accepts one of the following:

"timeout_error"

BetaAPIError = object { message, type }

message: string

type: "api_error"

Accepts one of the following:

"api_error"

BetaOverloadedError = object { message, type }

message: string

type: "overloaded_error"

Accepts one of the following:

"overloaded_error"

BetaErrorResponse = object { error, request_id, type }

error: BetaError

Accepts one of the following:

BetaInvalidRequestError = object { message, type }

message: string

type: "invalid_request_error"

Accepts one of the following:

"invalid_request_error"

BetaAuthenticationError = object { message, type }

message: string

type: "authentication_error"

Accepts one of the following:

"authentication_error"

BetaBillingError = object { message, type }

message: string

type: "billing_error"

Accepts one of the following:

"billing_error"

BetaPermissionError = object { message, type }

message: string

type: "permission_error"

Accepts one of the following:

"permission_error"

BetaNotFoundError = object { message, type }

message: string

type: "not_found_error"

Accepts one of the following:

"not_found_error"

BetaRateLimitError = object { message, type }

message: string

type: "rate_limit_error"

Accepts one of the following:

"rate_limit_error"

BetaGatewayTimeoutError = object { message, type }

message: string

type: "timeout_error"

Accepts one of the following:

"timeout_error"

BetaAPIError = object { message, type }

message: string

type: "api_error"

Accepts one of the following:

"api_error"

BetaOverloadedError = object { message, type }

message: string

type: "overloaded_error"

Accepts one of the following:

"overloaded_error"

request_id: string

type: "error"

Accepts one of the following:

"error"

BetaGatewayTimeoutError = object { message, type }

message: string

type: "timeout_error"

Accepts one of the following:

"timeout_error"

BetaInvalidRequestError = object { message, type }

message: string

type: "invalid_request_error"

Accepts one of the following:

"invalid_request_error"

BetaNotFoundError = object { message, type }

message: string

type: "not_found_error"

Accepts one of the following:

"not_found_error"

BetaOverloadedError = object { message, type }

message: string

type: "overloaded_error"

Accepts one of the following:

"overloaded_error"

BetaPermissionError = object { message, type }

message: string

type: "permission_error"

Accepts one of the following:

"permission_error"

BetaRateLimitError = object { message, type }

message: string

type: "rate_limit_error"

Accepts one of the following:

"rate_limit_error"

BetaModels

ModelsExpand Collapse

BetaModelInfo = object { id, created_at, display_name, type }

id: string

Unique model identifier.

created_at: string

RFC 3339 datetime string representing the time at which the model was released. May be set to an epoch value if the release date is unknown.

formatdate-time

display_name: string

A human-readable name for the model.

type: "model"

Object type.

For Models, this is always "model".

Accepts one of the following:

"model"

BetaMessages

ModelsExpand Collapse

BetaAllThinkingTurns = object { type }

type: "all"

Accepts one of the following:

"all"

BetaBase64ImageSource = object { data, media_type, type }

data: string

media_type: "image/jpeg" or "image/png" or "image/gif" or "image/webp"

Accepts one of the following:

"image/jpeg"

"image/png"

"image/gif"

"image/webp"

type: "base64"

Accepts one of the following:

"base64"

BetaBase64PDFSource = object { data, media_type, type }

data: string

media_type: "application/pdf"

Accepts one of the following:

"application/pdf"

type: "base64"

Accepts one of the following:

"base64"

BetaBashCodeExecutionOutputBlock = object { file_id, type }

file_id: string

type: "bash_code_execution_output"

Accepts one of the following:

"bash_code_execution_output"

BetaBashCodeExecutionOutputBlockParam = object { file_id, type }

file_id: string

type: "bash_code_execution_output"

Accepts one of the following:

"bash_code_execution_output"

BetaBashCodeExecutionResultBlock = object { content, return_code, stderr, 2 more }

content: array of BetaBashCodeExecutionOutputBlock { file_id, type }

file_id: string

type: "bash_code_execution_output"

Accepts one of the following:

"bash_code_execution_output"

return_code: number

stderr: string

stdout: string

type: "bash_code_execution_result"

Accepts one of the following:

"bash_code_execution_result"

BetaBashCodeExecutionResultBlockParam = object { content, return_code, stderr, 2 more }

content: array of BetaBashCodeExecutionOutputBlockParam { file_id, type }

file_id: string

type: "bash_code_execution_output"

Accepts one of the following:

"bash_code_execution_output"

return_code: number

stderr: string

stdout: string

type: "bash_code_execution_result"

Accepts one of the following:

"bash_code_execution_result"

BetaBashCodeExecutionToolResultBlock = object { content, tool_use_id, type }

content: BetaBashCodeExecutionToolResultError { error_code, type } or BetaBashCodeExecutionResultBlock { content, return_code, stderr, 2 more }

Accepts one of the following:

BetaBashCodeExecutionToolResultError = object { error_code, type }

error_code: "invalid_tool_input" or "unavailable" or "too_many_requests" or 2 more

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

"output_file_too_large"

type: "bash_code_execution_tool_result_error"

Accepts one of the following:

"bash_code_execution_tool_result_error"

BetaBashCodeExecutionResultBlock = object { content, return_code, stderr, 2 more }

content: array of BetaBashCodeExecutionOutputBlock { file_id, type }

file_id: string

type: "bash_code_execution_output"

Accepts one of the following:

"bash_code_execution_output"

return_code: number

stderr: string

stdout: string

type: "bash_code_execution_result"

Accepts one of the following:

"bash_code_execution_result"

tool_use_id: string

type: "bash_code_execution_tool_result"

Accepts one of the following:

"bash_code_execution_tool_result"

BetaBashCodeExecutionToolResultBlockParam = object { content, tool_use_id, type, cache_control }

content: BetaBashCodeExecutionToolResultErrorParam { error_code, type } or BetaBashCodeExecutionResultBlockParam { content, return_code, stderr, 2 more }

Accepts one of the following:

BetaBashCodeExecutionToolResultErrorParam = object { error_code, type }

error_code: "invalid_tool_input" or "unavailable" or "too_many_requests" or 2 more

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

"output_file_too_large"

type: "bash_code_execution_tool_result_error"

Accepts one of the following:

"bash_code_execution_tool_result_error"

BetaBashCodeExecutionResultBlockParam = object { content, return_code, stderr, 2 more }

content: array of BetaBashCodeExecutionOutputBlockParam { file_id, type }

file_id: string

type: "bash_code_execution_output"

Accepts one of the following:

"bash_code_execution_output"

return_code: number

stderr: string

stdout: string

type: "bash_code_execution_result"

Accepts one of the following:

"bash_code_execution_result"

tool_use_id: string

type: "bash_code_execution_tool_result"

Accepts one of the following:

"bash_code_execution_tool_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaBashCodeExecutionToolResultError = object { error_code, type }

error_code: "invalid_tool_input" or "unavailable" or "too_many_requests" or 2 more

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

"output_file_too_large"

type: "bash_code_execution_tool_result_error"

Accepts one of the following:

"bash_code_execution_tool_result_error"

BetaBashCodeExecutionToolResultErrorParam = object { error_code, type }

error_code: "invalid_tool_input" or "unavailable" or "too_many_requests" or 2 more

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

"output_file_too_large"

type: "bash_code_execution_tool_result_error"

Accepts one of the following:

"bash_code_execution_tool_result_error"

BetaCacheControlEphemeral = object { type, ttl }

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaCacheCreation = object { ephemeral_1h_input_tokens, ephemeral_5m_input_tokens }

ephemeral_1h_input_tokens: number

The number of input tokens used to create the 1 hour cache entry.

minimum0

ephemeral_5m_input_tokens: number

The number of input tokens used to create the 5 minute cache entry.

minimum0

BetaCitationCharLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

file_id: string

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationCharLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationConfig = object { enabled }

enabled: boolean

BetaCitationContentBlockLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

file_id: string

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationContentBlockLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationPageLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

file_id: string

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationPageLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationSearchResultLocation = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

BetaCitationSearchResultLocationParam = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

BetaCitationWebSearchResultLocationParam = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationsConfigParam = object { enabled }

enabled: optional boolean

BetaCitationsDelta = object { citation, type }

citation: BetaCitationCharLocation { cited_text, document_index, document_title, 4 more } or BetaCitationPageLocation { cited_text, document_index, document_title, 4 more } or BetaCitationContentBlockLocation { cited_text, document_index, document_title, 4 more } or 2 more

Accepts one of the following:

BetaCitationCharLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

file_id: string

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

file_id: string

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

file_id: string

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationsWebSearchResultLocation = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocation = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

type: "citations_delta"

Accepts one of the following:

"citations_delta"

BetaCitationsWebSearchResultLocation = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaClearThinking20251015Edit = object { type, keep }

type: "clear_thinking_20251015"

Accepts one of the following:

"clear_thinking_20251015"

keep: optional BetaThinkingTurns { type, value } or BetaAllThinkingTurns { type } or "all"

Number of most recent assistant turns to keep thinking blocks for. Older turns will have their thinking blocks removed.

Accepts one of the following:

BetaThinkingTurns = object { type, value }

type: "thinking_turns"

Accepts one of the following:

"thinking_turns"

value: number

BetaAllThinkingTurns = object { type }

type: "all"

Accepts one of the following:

"all"

UnionMember2 = "all"

Accepts one of the following:

"all"

BetaClearThinking20251015EditResponse = object { cleared_input_tokens, cleared_thinking_turns, type }

cleared_input_tokens: number

Number of input tokens cleared by this edit.

minimum0

cleared_thinking_turns: number

Number of thinking turns that were cleared.

minimum0

type: "clear_thinking_20251015"

The type of context management edit applied.

Accepts one of the following:

"clear_thinking_20251015"

BetaClearToolUses20250919Edit = object { type, clear_at_least, clear_tool_inputs, 3 more }

type: "clear_tool_uses_20250919"

Accepts one of the following:

"clear_tool_uses_20250919"

clear_at_least: optional BetaInputTokensClearAtLeast { type, value }

Minimum number of tokens that must be cleared when triggered. Context will only be modified if at least this many tokens can be removed.

type: "input_tokens"

Accepts one of the following:

"input_tokens"

value: number

clear_tool_inputs: optional boolean or array of string

Whether to clear all tool inputs (bool) or specific tool inputs to clear (list)

Accepts one of the following:

UnionMember0 = boolean

UnionMember1 = array of string

exclude_tools: optional array of string

Tool names whose uses are preserved from clearing

keep: optional BetaToolUsesKeep { type, value }

Number of tool uses to retain in the conversation

type: "tool_uses"

Accepts one of the following:

"tool_uses"

value: number

trigger: optional BetaInputTokensTrigger { type, value } or BetaToolUsesTrigger { type, value }

Condition that triggers the context management strategy

Accepts one of the following:

BetaInputTokensTrigger = object { type, value }

type: "input_tokens"

Accepts one of the following:

"input_tokens"

value: number

BetaToolUsesTrigger = object { type, value }

type: "tool_uses"

Accepts one of the following:

"tool_uses"

value: number

BetaClearToolUses20250919EditResponse = object { cleared_input_tokens, cleared_tool_uses, type }

cleared_input_tokens: number

Number of input tokens cleared by this edit.

minimum0

cleared_tool_uses: number

Number of tool uses that were cleared.

minimum0

type: "clear_tool_uses_20250919"

The type of context management edit applied.

Accepts one of the following:

"clear_tool_uses_20250919"

BetaCodeExecutionOutputBlock = object { file_id, type }

file_id: string

type: "code_execution_output"

Accepts one of the following:

"code_execution_output"

BetaCodeExecutionOutputBlockParam = object { file_id, type }

file_id: string

type: "code_execution_output"

Accepts one of the following:

"code_execution_output"

BetaCodeExecutionResultBlock = object { content, return_code, stderr, 2 more }

content: array of BetaCodeExecutionOutputBlock { file_id, type }

file_id: string

type: "code_execution_output"

Accepts one of the following:

"code_execution_output"

return_code: number

stderr: string

stdout: string

type: "code_execution_result"

Accepts one of the following:

"code_execution_result"

BetaCodeExecutionResultBlockParam = object { content, return_code, stderr, 2 more }

content: array of BetaCodeExecutionOutputBlockParam { file_id, type }

file_id: string

type: "code_execution_output"

Accepts one of the following:

"code_execution_output"

return_code: number

stderr: string

stdout: string

type: "code_execution_result"

Accepts one of the following:

"code_execution_result"

BetaCodeExecutionTool20250522 = object { name, type, allowed_callers, 3 more }

Name of the tool.

This is how the tool will be called by the model and in tool_use blocks.

Accepts one of the following:

"code_execution"

type: "code_execution_20250522"

Accepts one of the following:

"code_execution_20250522"

allowed_callers: optional array of "direct" or "code_execution_20250825"

Accepts one of the following:

"direct"

"code_execution_20250825"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

defer_loading: optional boolean

If true, tool will not be included in initial system prompt. Only loaded when returned via tool_reference from tool search.

strict: optional boolean

BetaCodeExecutionTool20250825 = object { name, type, allowed_callers, 3 more }

Name of the tool.

This is how the tool will be called by the model and in tool_use blocks.

Accepts one of the following:

"code_execution"

type: "code_execution_20250825"

Accepts one of the following:

"code_execution_20250825"

allowed_callers: optional array of "direct" or "code_execution_20250825"

Accepts one of the following:

"direct"

"code_execution_20250825"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

defer_loading: optional boolean

If true, tool will not be included in initial system prompt. Only loaded when returned via tool_reference from tool search.

strict: optional boolean

BetaCodeExecutionToolResultBlock = object { content, tool_use_id, type }

content: BetaCodeExecutionToolResultBlockContent

Accepts one of the following:

BetaCodeExecutionToolResultError = object { error_code, type }

error_code: BetaCodeExecutionToolResultErrorCode

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

type: "code_execution_tool_result_error"

Accepts one of the following:

"code_execution_tool_result_error"

BetaCodeExecutionResultBlock = object { content, return_code, stderr, 2 more }

content: array of BetaCodeExecutionOutputBlock { file_id, type }

file_id: string

type: "code_execution_output"

Accepts one of the following:

"code_execution_output"

return_code: number

stderr: string

stdout: string

type: "code_execution_result"

Accepts one of the following:

"code_execution_result"

tool_use_id: string

type: "code_execution_tool_result"

Accepts one of the following:

"code_execution_tool_result"

BetaCodeExecutionToolResultBlockContent = BetaCodeExecutionToolResultError { error_code, type } or BetaCodeExecutionResultBlock { content, return_code, stderr, 2 more }

Accepts one of the following:

BetaCodeExecutionToolResultError = object { error_code, type }

error_code: BetaCodeExecutionToolResultErrorCode

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

type: "code_execution_tool_result_error"

Accepts one of the following:

"code_execution_tool_result_error"

BetaCodeExecutionResultBlock = object { content, return_code, stderr, 2 more }

content: array of BetaCodeExecutionOutputBlock { file_id, type }

file_id: string

type: "code_execution_output"

Accepts one of the following:

"code_execution_output"

return_code: number

stderr: string

stdout: string

type: "code_execution_result"

Accepts one of the following:

"code_execution_result"

BetaCodeExecutionToolResultBlockParam = object { content, tool_use_id, type, cache_control }

content: BetaCodeExecutionToolResultBlockParamContent

Accepts one of the following:

BetaCodeExecutionToolResultErrorParam = object { error_code, type }

error_code: BetaCodeExecutionToolResultErrorCode

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

type: "code_execution_tool_result_error"

Accepts one of the following:

"code_execution_tool_result_error"

BetaCodeExecutionResultBlockParam = object { content, return_code, stderr, 2 more }

content: array of BetaCodeExecutionOutputBlockParam { file_id, type }

file_id: string

type: "code_execution_output"

Accepts one of the following:

"code_execution_output"

return_code: number

stderr: string

stdout: string

type: "code_execution_result"

Accepts one of the following:

"code_execution_result"

tool_use_id: string

type: "code_execution_tool_result"

Accepts one of the following:

"code_execution_tool_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaCodeExecutionToolResultBlockParamContent = BetaCodeExecutionToolResultErrorParam { error_code, type } or BetaCodeExecutionResultBlockParam { content, return_code, stderr, 2 more }

Accepts one of the following:

BetaCodeExecutionToolResultErrorParam = object { error_code, type }

error_code: BetaCodeExecutionToolResultErrorCode

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

type: "code_execution_tool_result_error"

Accepts one of the following:

"code_execution_tool_result_error"

BetaCodeExecutionResultBlockParam = object { content, return_code, stderr, 2 more }

content: array of BetaCodeExecutionOutputBlockParam { file_id, type }

file_id: string

type: "code_execution_output"

Accepts one of the following:

"code_execution_output"

return_code: number

stderr: string

stdout: string

type: "code_execution_result"

Accepts one of the following:

"code_execution_result"

BetaCodeExecutionToolResultError = object { error_code, type }

error_code: BetaCodeExecutionToolResultErrorCode

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

type: "code_execution_tool_result_error"

Accepts one of the following:

"code_execution_tool_result_error"

BetaCodeExecutionToolResultErrorCode = "invalid_tool_input" or "unavailable" or "too_many_requests" or "execution_time_exceeded"

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

BetaCodeExecutionToolResultErrorParam = object { error_code, type }

error_code: BetaCodeExecutionToolResultErrorCode

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

type: "code_execution_tool_result_error"

Accepts one of the following:

"code_execution_tool_result_error"

BetaContainer = object { id, expires_at, skills }

Information about the container used in the request (for the code execution tool)

id: string

Identifier for the container used in this request

expires_at: string

The time at which the container will expire.

formatdate-time

skills: array of BetaSkill { skill_id, type, version }

Skills loaded in the container

skill_id: string

Skill ID

maxLength64

minLength1

type: "anthropic" or "custom"

Type of skill - either 'anthropic' (built-in) or 'custom' (user-defined)

Accepts one of the following:

"anthropic"

"custom"

version: string

Skill version or 'latest' for most recent version

maxLength64

minLength1

BetaContainerParams = object { id, skills }

Container parameters with skills to be loaded.

id: optional string

Container id

skills: optional array of BetaSkillParams { skill_id, type, version }

List of skills to load in the container

skill_id: string

Skill ID

maxLength64

minLength1

type: "anthropic" or "custom"

Type of skill - either 'anthropic' (built-in) or 'custom' (user-defined)

Accepts one of the following:

"anthropic"

"custom"

version: optional string

Skill version or 'latest' for most recent version

maxLength64

minLength1

BetaContainerUploadBlock = object { file_id, type }

Response model for a file uploaded to the container.

file_id: string

type: "container_upload"

Accepts one of the following:

"container_upload"

BetaContainerUploadBlockParam = object { file_id, type, cache_control }

A content block that represents a file to be uploaded to the container Files uploaded via this block will be available in the container's input directory.

file_id: string

type: "container_upload"

Accepts one of the following:

"container_upload"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaContentBlock = BetaTextBlock { citations, text, type } or BetaThinkingBlock { signature, thinking, type } or BetaRedactedThinkingBlock { data, type } or 11 more

Response model for a file uploaded to the container.

Accepts one of the following:

BetaTextBlock = object { citations, text, type }

citations: array of BetaTextCitation

Citations supporting the text block.

The type of citation returned will depend on the type of document being cited. Citing a PDF results in page_location, plain text results in char_location, and content document results in content_block_location.

Accepts one of the following:

BetaCitationCharLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

file_id: string

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

file_id: string

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

file_id: string

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationsWebSearchResultLocation = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocation = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

text: string

type: "text"

Accepts one of the following:

"text"

BetaThinkingBlock = object { signature, thinking, type }

signature: string

thinking: string

type: "thinking"

Accepts one of the following:

"thinking"

BetaRedactedThinkingBlock = object { data, type }

data: string

type: "redacted_thinking"

Accepts one of the following:

"redacted_thinking"

BetaToolUseBlock = object { id, input, name, 2 more }

id: string

input: map[unknown]

type: "tool_use"

Accepts one of the following:

"tool_use"

caller: optional BetaDirectCaller { type } or BetaServerToolCaller { tool_id, type }

Tool invocation directly from the model.

Accepts one of the following:

BetaDirectCaller = object { type }

Tool invocation directly from the model.

type: "direct"

Accepts one of the following:

"direct"

BetaServerToolCaller = object { tool_id, type }

Tool invocation generated by a server-side tool.

tool_id: string

type: "code_execution_20250825"

Accepts one of the following:

"code_execution_20250825"

BetaServerToolUseBlock = object { id, caller, input, 2 more }

id: string

caller: BetaDirectCaller { type } or BetaServerToolCaller { tool_id, type }

Tool invocation directly from the model.

Accepts one of the following:

BetaDirectCaller = object { type }

Tool invocation directly from the model.

type: "direct"

Accepts one of the following:

"direct"

BetaServerToolCaller = object { tool_id, type }

Tool invocation generated by a server-side tool.

tool_id: string

type: "code_execution_20250825"

Accepts one of the following:

"code_execution_20250825"

input: map[unknown]

Accepts one of the following:

"web_search"

"web_fetch"

"code_execution"

"bash_code_execution"

"text_editor_code_execution"

"tool_search_tool_regex"

"tool_search_tool_bm25"

type: "server_tool_use"

Accepts one of the following:

"server_tool_use"

BetaWebSearchToolResultBlock = object { content, tool_use_id, type }

content: BetaWebSearchToolResultBlockContent

Accepts one of the following:

BetaWebSearchToolResultError = object { error_code, type }

error_code: BetaWebSearchToolResultErrorCode

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"max_uses_exceeded"

"too_many_requests"

"query_too_long"

type: "web_search_tool_result_error"

Accepts one of the following:

"web_search_tool_result_error"

UnionMember1 = array of BetaWebSearchResultBlock { encrypted_content, page_age, title, 2 more }

encrypted_content: string

page_age: string

title: string

type: "web_search_result"

Accepts one of the following:

"web_search_result"

url: string

tool_use_id: string

type: "web_search_tool_result"

Accepts one of the following:

"web_search_tool_result"

BetaWebFetchToolResultBlock = object { content, tool_use_id, type }

content: BetaWebFetchToolResultErrorBlock { error_code, type } or BetaWebFetchBlock { content, retrieved_at, type, url }

Accepts one of the following:

BetaWebFetchToolResultErrorBlock = object { error_code, type }

error_code: BetaWebFetchToolResultErrorCode

Accepts one of the following:

"invalid_tool_input"

"url_too_long"

"url_not_allowed"

"url_not_accessible"

"unsupported_content_type"

"too_many_requests"

"max_uses_exceeded"

"unavailable"

type: "web_fetch_tool_result_error"

Accepts one of the following:

"web_fetch_tool_result_error"

BetaWebFetchBlock = object { content, retrieved_at, type, url }

content: BetaDocumentBlock { citations, source, title, type }

citations: BetaCitationConfig { enabled }

Citation configuration for the document

enabled: boolean

source: BetaBase64PDFSource { data, media_type, type } or BetaPlainTextSource { data, media_type, type }

Accepts one of the following:

BetaBase64PDFSource = object { data, media_type, type }

data: string

media_type: "application/pdf"

Accepts one of the following:

"application/pdf"

type: "base64"

Accepts one of the following:

"base64"

BetaPlainTextSource = object { data, media_type, type }

data: string

media_type: "text/plain"

Accepts one of the following:

"text/plain"

type: "text"

Accepts one of the following:

"text"

title: string

The title of the document

type: "document"

Accepts one of the following:

"document"

retrieved_at: string

ISO 8601 timestamp when the content was retrieved

type: "web_fetch_result"

Accepts one of the following:

"web_fetch_result"

url: string

Fetched content URL

tool_use_id: string

type: "web_fetch_tool_result"

Accepts one of the following:

"web_fetch_tool_result"

BetaCodeExecutionToolResultBlock = object { content, tool_use_id, type }

content: BetaCodeExecutionToolResultBlockContent

Accepts one of the following:

BetaCodeExecutionToolResultError = object { error_code, type }

error_code: BetaCodeExecutionToolResultErrorCode

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

type: "code_execution_tool_result_error"

Accepts one of the following:

"code_execution_tool_result_error"

BetaCodeExecutionResultBlock = object { content, return_code, stderr, 2 more }

content: array of BetaCodeExecutionOutputBlock { file_id, type }

file_id: string

type: "code_execution_output"

Accepts one of the following:

"code_execution_output"

return_code: number

stderr: string

stdout: string

type: "code_execution_result"

Accepts one of the following:

"code_execution_result"

tool_use_id: string

type: "code_execution_tool_result"

Accepts one of the following:

"code_execution_tool_result"

BetaBashCodeExecutionToolResultBlock = object { content, tool_use_id, type }

content: BetaBashCodeExecutionToolResultError { error_code, type } or BetaBashCodeExecutionResultBlock { content, return_code, stderr, 2 more }

Accepts one of the following:

BetaBashCodeExecutionToolResultError = object { error_code, type }

error_code: "invalid_tool_input" or "unavailable" or "too_many_requests" or 2 more

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

"output_file_too_large"

type: "bash_code_execution_tool_result_error"

Accepts one of the following:

"bash_code_execution_tool_result_error"

BetaBashCodeExecutionResultBlock = object { content, return_code, stderr, 2 more }

content: array of BetaBashCodeExecutionOutputBlock { file_id, type }

file_id: string

type: "bash_code_execution_output"

Accepts one of the following:

"bash_code_execution_output"

return_code: number

stderr: string

stdout: string

type: "bash_code_execution_result"

Accepts one of the following:

"bash_code_execution_result"

tool_use_id: string

type: "bash_code_execution_tool_result"

Accepts one of the following:

"bash_code_execution_tool_result"

BetaTextEditorCodeExecutionToolResultBlock = object { content, tool_use_id, type }

content: BetaTextEditorCodeExecutionToolResultError { error_code, error_message, type } or BetaTextEditorCodeExecutionViewResultBlock { content, file_type, num_lines, 3 more } or BetaTextEditorCodeExecutionCreateResultBlock { is_file_update, type } or BetaTextEditorCodeExecutionStrReplaceResultBlock { lines, new_lines, new_start, 3 more }

Accepts one of the following:

BetaTextEditorCodeExecutionToolResultError = object { error_code, error_message, type }

error_code: "invalid_tool_input" or "unavailable" or "too_many_requests" or 2 more

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

"file_not_found"

error_message: string

type: "text_editor_code_execution_tool_result_error"

Accepts one of the following:

"text_editor_code_execution_tool_result_error"

BetaTextEditorCodeExecutionViewResultBlock = object { content, file_type, num_lines, 3 more }

content: string

file_type: "text" or "image" or "pdf"

Accepts one of the following:

"text"

"image"

"pdf"

num_lines: number

start_line: number

total_lines: number

type: "text_editor_code_execution_view_result"

Accepts one of the following:

"text_editor_code_execution_view_result"

BetaTextEditorCodeExecutionCreateResultBlock = object { is_file_update, type }

is_file_update: boolean

type: "text_editor_code_execution_create_result"

Accepts one of the following:

"text_editor_code_execution_create_result"

BetaTextEditorCodeExecutionStrReplaceResultBlock = object { lines, new_lines, new_start, 3 more }

lines: array of string

new_lines: number

new_start: number

old_lines: number

old_start: number

type: "text_editor_code_execution_str_replace_result"

Accepts one of the following:

"text_editor_code_execution_str_replace_result"

tool_use_id: string

type: "text_editor_code_execution_tool_result"

Accepts one of the following:

"text_editor_code_execution_tool_result"

BetaToolSearchToolResultBlock = object { content, tool_use_id, type }

content: BetaToolSearchToolResultError { error_code, error_message, type } or BetaToolSearchToolSearchResultBlock { tool_references, type }

Accepts one of the following:

BetaToolSearchToolResultError = object { error_code, error_message, type }

error_code: "invalid_tool_input" or "unavailable" or "too_many_requests" or "execution_time_exceeded"

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

error_message: string

type: "tool_search_tool_result_error"

Accepts one of the following:

"tool_search_tool_result_error"

BetaToolSearchToolSearchResultBlock = object { tool_references, type }

tool_references: array of BetaToolReferenceBlock { tool_name, type }

tool_name: string

type: "tool_reference"

Accepts one of the following:

"tool_reference"

type: "tool_search_tool_search_result"

Accepts one of the following:

"tool_search_tool_search_result"

tool_use_id: string

type: "tool_search_tool_result"

Accepts one of the following:

"tool_search_tool_result"

BetaMCPToolUseBlock = object { id, input, name, 2 more }

id: string

input: map[unknown]

The name of the MCP tool

server_name: string

The name of the MCP server

type: "mcp_tool_use"

Accepts one of the following:

"mcp_tool_use"

BetaMCPToolResultBlock = object { content, is_error, tool_use_id, type }

content: string or array of BetaTextBlock { citations, text, type }

Accepts one of the following:

UnionMember0 = string

BetaMCPToolResultBlockContent = array of BetaTextBlock { citations, text, type }

citations: array of BetaTextCitation

Citations supporting the text block.

Accepts one of the following:

BetaCitationCharLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

file_id: string

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

file_id: string

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

file_id: string

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationsWebSearchResultLocation = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocation = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

text: string

type: "text"

Accepts one of the following:

"text"

is_error: boolean

tool_use_id: string

type: "mcp_tool_result"

Accepts one of the following:

"mcp_tool_result"

BetaContainerUploadBlock = object { file_id, type }

Response model for a file uploaded to the container.

file_id: string

type: "container_upload"

Accepts one of the following:

"container_upload"

BetaContentBlockParam = BetaTextBlockParam { text, type, cache_control, citations } or BetaImageBlockParam { source, type, cache_control } or BetaRequestDocumentBlock { source, type, cache_control, 3 more } or 15 more

Regular text content.

Accepts one of the following:

BetaTextBlockParam = object { text, type, cache_control, citations }

text: string

type: "text"

Accepts one of the following:

"text"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional array of BetaTextCitationParam

Accepts one of the following:

BetaCitationCharLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationWebSearchResultLocationParam = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocationParam = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

BetaImageBlockParam = object { source, type, cache_control }

source: BetaBase64ImageSource { data, media_type, type } or BetaURLImageSource { type, url } or BetaFileImageSource { file_id, type }

Accepts one of the following:

BetaBase64ImageSource = object { data, media_type, type }

data: string

media_type: "image/jpeg" or "image/png" or "image/gif" or "image/webp"

Accepts one of the following:

"image/jpeg"

"image/png"

"image/gif"

"image/webp"

type: "base64"

Accepts one of the following:

"base64"

BetaURLImageSource = object { type, url }

type: "url"

Accepts one of the following:

"url"

url: string

BetaFileImageSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

type: "image"

Accepts one of the following:

"image"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaRequestDocumentBlock = object { source, type, cache_control, 3 more }

source: BetaBase64PDFSource { data, media_type, type } or BetaPlainTextSource { data, media_type, type } or BetaContentBlockSource { content, type } or 2 more

Accepts one of the following:

BetaBase64PDFSource = object { data, media_type, type }

data: string

media_type: "application/pdf"

Accepts one of the following:

"application/pdf"

type: "base64"

Accepts one of the following:

"base64"

BetaPlainTextSource = object { data, media_type, type }

data: string

media_type: "text/plain"

Accepts one of the following:

"text/plain"

type: "text"

Accepts one of the following:

"text"

BetaContentBlockSource = object { content, type }

content: string or array of BetaContentBlockSourceContent

Accepts one of the following:

UnionMember0 = string

BetaContentBlockSourceContent = array of BetaContentBlockSourceContent

Accepts one of the following:

BetaTextBlockParam = object { text, type, cache_control, citations }

text: string

type: "text"

Accepts one of the following:

"text"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional array of BetaTextCitationParam

Accepts one of the following:

BetaCitationCharLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationWebSearchResultLocationParam = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocationParam = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

BetaImageBlockParam = object { source, type, cache_control }

source: BetaBase64ImageSource { data, media_type, type } or BetaURLImageSource { type, url } or BetaFileImageSource { file_id, type }

Accepts one of the following:

BetaBase64ImageSource = object { data, media_type, type }

data: string

media_type: "image/jpeg" or "image/png" or "image/gif" or "image/webp"

Accepts one of the following:

"image/jpeg"

"image/png"

"image/gif"

"image/webp"

type: "base64"

Accepts one of the following:

"base64"

BetaURLImageSource = object { type, url }

type: "url"

Accepts one of the following:

"url"

url: string

BetaFileImageSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

type: "image"

Accepts one of the following:

"image"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

type: "content"

Accepts one of the following:

"content"

BetaURLPDFSource = object { type, url }

type: "url"

Accepts one of the following:

"url"

url: string

BetaFileDocumentSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

type: "document"

Accepts one of the following:

"document"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional BetaCitationsConfigParam { enabled }

enabled: optional boolean

context: optional string

title: optional string

BetaSearchResultBlockParam = object { content, source, title, 3 more }

content: array of BetaTextBlockParam { text, type, cache_control, citations }

text: string

type: "text"

Accepts one of the following:

"text"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional array of BetaTextCitationParam

Accepts one of the following:

BetaCitationCharLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationWebSearchResultLocationParam = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocationParam = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

source: string

title: string

type: "search_result"

Accepts one of the following:

"search_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional BetaCitationsConfigParam { enabled }

enabled: optional boolean

BetaThinkingBlockParam = object { signature, thinking, type }

signature: string

thinking: string

type: "thinking"

Accepts one of the following:

"thinking"

BetaRedactedThinkingBlockParam = object { data, type }

data: string

type: "redacted_thinking"

Accepts one of the following:

"redacted_thinking"

BetaToolUseBlockParam = object { id, input, name, 3 more }

id: string

input: map[unknown]

type: "tool_use"

Accepts one of the following:

"tool_use"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

caller: optional BetaDirectCaller { type } or BetaServerToolCaller { tool_id, type }

Tool invocation directly from the model.

Accepts one of the following:

BetaDirectCaller = object { type }

Tool invocation directly from the model.

type: "direct"

Accepts one of the following:

"direct"

BetaServerToolCaller = object { tool_id, type }

Tool invocation generated by a server-side tool.

tool_id: string

type: "code_execution_20250825"

Accepts one of the following:

"code_execution_20250825"

BetaToolResultBlockParam = object { tool_use_id, type, cache_control, 2 more }

tool_use_id: string

type: "tool_result"

Accepts one of the following:

"tool_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

content: optional string or array of BetaTextBlockParam { text, type, cache_control, citations } or BetaImageBlockParam { source, type, cache_control } or BetaSearchResultBlockParam { content, source, title, 3 more } or 2 more

Accepts one of the following:

UnionMember0 = string

UnionMember1 = array of BetaTextBlockParam { text, type, cache_control, citations } or BetaImageBlockParam { source, type, cache_control } or BetaSearchResultBlockParam { content, source, title, 3 more } or 2 more

Accepts one of the following:

BetaTextBlockParam = object { text, type, cache_control, citations }

text: string

type: "text"

Accepts one of the following:

"text"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional array of BetaTextCitationParam

Accepts one of the following:

BetaCitationCharLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationWebSearchResultLocationParam = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocationParam = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

BetaImageBlockParam = object { source, type, cache_control }

source: BetaBase64ImageSource { data, media_type, type } or BetaURLImageSource { type, url } or BetaFileImageSource { file_id, type }

Accepts one of the following:

BetaBase64ImageSource = object { data, media_type, type }

data: string

media_type: "image/jpeg" or "image/png" or "image/gif" or "image/webp"

Accepts one of the following:

"image/jpeg"

"image/png"

"image/gif"

"image/webp"

type: "base64"

Accepts one of the following:

"base64"

BetaURLImageSource = object { type, url }

type: "url"

Accepts one of the following:

"url"

url: string

BetaFileImageSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

type: "image"

Accepts one of the following:

"image"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaSearchResultBlockParam = object { content, source, title, 3 more }

content: array of BetaTextBlockParam { text, type, cache_control, citations }

text: string

type: "text"

Accepts one of the following:

"text"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional array of BetaTextCitationParam

Accepts one of the following:

BetaCitationCharLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationWebSearchResultLocationParam = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocationParam = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

source: string

title: string

type: "search_result"

Accepts one of the following:

"search_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional BetaCitationsConfigParam { enabled }

enabled: optional boolean

BetaRequestDocumentBlock = object { source, type, cache_control, 3 more }

source: BetaBase64PDFSource { data, media_type, type } or BetaPlainTextSource { data, media_type, type } or BetaContentBlockSource { content, type } or 2 more

Accepts one of the following:

BetaBase64PDFSource = object { data, media_type, type }

data: string

media_type: "application/pdf"

Accepts one of the following:

"application/pdf"

type: "base64"

Accepts one of the following:

"base64"

BetaPlainTextSource = object { data, media_type, type }

data: string

media_type: "text/plain"

Accepts one of the following:

"text/plain"

type: "text"

Accepts one of the following:

"text"

BetaContentBlockSource = object { content, type }

content: string or array of BetaContentBlockSourceContent

Accepts one of the following:

UnionMember0 = string

BetaContentBlockSourceContent = array of BetaContentBlockSourceContent

Accepts one of the following:

BetaTextBlockParam = object { text, type, cache_control, citations }

text: string

type: "text"

Accepts one of the following:

"text"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional array of BetaTextCitationParam

Accepts one of the following:

BetaCitationCharLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationWebSearchResultLocationParam = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocationParam = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

BetaImageBlockParam = object { source, type, cache_control }

source: BetaBase64ImageSource { data, media_type, type } or BetaURLImageSource { type, url } or BetaFileImageSource { file_id, type }

Accepts one of the following:

BetaBase64ImageSource = object { data, media_type, type }

data: string

media_type: "image/jpeg" or "image/png" or "image/gif" or "image/webp"

Accepts one of the following:

"image/jpeg"

"image/png"

"image/gif"

"image/webp"

type: "base64"

Accepts one of the following:

"base64"

BetaURLImageSource = object { type, url }

type: "url"

Accepts one of the following:

"url"

url: string

BetaFileImageSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

type: "image"

Accepts one of the following:

"image"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

type: "content"

Accepts one of the following:

"content"

BetaURLPDFSource = object { type, url }

type: "url"

Accepts one of the following:

"url"

url: string

BetaFileDocumentSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

type: "document"

Accepts one of the following:

"document"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional BetaCitationsConfigParam { enabled }

enabled: optional boolean

context: optional string

title: optional string

BetaToolReferenceBlockParam = object { tool_name, type, cache_control }

Tool reference block that can be included in tool_result content.

tool_name: string

type: "tool_reference"

Accepts one of the following:

"tool_reference"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

is_error: optional boolean

BetaServerToolUseBlockParam = object { id, input, name, 3 more }

id: string

input: map[unknown]

Accepts one of the following:

"web_search"

"web_fetch"

"code_execution"

"bash_code_execution"

"text_editor_code_execution"

"tool_search_tool_regex"

"tool_search_tool_bm25"

type: "server_tool_use"

Accepts one of the following:

"server_tool_use"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

caller: optional BetaDirectCaller { type } or BetaServerToolCaller { tool_id, type }

Tool invocation directly from the model.

Accepts one of the following:

BetaDirectCaller = object { type }

Tool invocation directly from the model.

type: "direct"

Accepts one of the following:

"direct"

BetaServerToolCaller = object { tool_id, type }

Tool invocation generated by a server-side tool.

tool_id: string

type: "code_execution_20250825"

Accepts one of the following:

"code_execution_20250825"

BetaWebSearchToolResultBlockParam = object { content, tool_use_id, type, cache_control }

content: BetaWebSearchToolResultBlockParamContent

Accepts one of the following:

ResultBlock = array of BetaWebSearchResultBlockParam { encrypted_content, title, type, 2 more }

encrypted_content: string

title: string

type: "web_search_result"

Accepts one of the following:

"web_search_result"

url: string

page_age: optional string

BetaWebSearchToolRequestError = object { error_code, type }

error_code: BetaWebSearchToolResultErrorCode

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"max_uses_exceeded"

"too_many_requests"

"query_too_long"

type: "web_search_tool_result_error"

Accepts one of the following:

"web_search_tool_result_error"

tool_use_id: string

type: "web_search_tool_result"

Accepts one of the following:

"web_search_tool_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaWebFetchToolResultBlockParam = object { content, tool_use_id, type, cache_control }

content: BetaWebFetchToolResultErrorBlockParam { error_code, type } or BetaWebFetchBlockParam { content, type, url, retrieved_at }

Accepts one of the following:

BetaWebFetchToolResultErrorBlockParam = object { error_code, type }

error_code: BetaWebFetchToolResultErrorCode

Accepts one of the following:

"invalid_tool_input"

"url_too_long"

"url_not_allowed"

"url_not_accessible"

"unsupported_content_type"

"too_many_requests"

"max_uses_exceeded"

"unavailable"

type: "web_fetch_tool_result_error"

Accepts one of the following:

"web_fetch_tool_result_error"

BetaWebFetchBlockParam = object { content, type, url, retrieved_at }

content: BetaRequestDocumentBlock { source, type, cache_control, 3 more }

source: BetaBase64PDFSource { data, media_type, type } or BetaPlainTextSource { data, media_type, type } or BetaContentBlockSource { content, type } or 2 more

Accepts one of the following:

BetaBase64PDFSource = object { data, media_type, type }

data: string

media_type: "application/pdf"

Accepts one of the following:

"application/pdf"

type: "base64"

Accepts one of the following:

"base64"

BetaPlainTextSource = object { data, media_type, type }

data: string

media_type: "text/plain"

Accepts one of the following:

"text/plain"

type: "text"

Accepts one of the following:

"text"

BetaContentBlockSource = object { content, type }

content: string or array of BetaContentBlockSourceContent

Accepts one of the following:

UnionMember0 = string

BetaContentBlockSourceContent = array of BetaContentBlockSourceContent

Accepts one of the following:

BetaTextBlockParam = object { text, type, cache_control, citations }

text: string

type: "text"

Accepts one of the following:

"text"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional array of BetaTextCitationParam

Accepts one of the following:

BetaCitationCharLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationWebSearchResultLocationParam = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocationParam = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

BetaImageBlockParam = object { source, type, cache_control }

source: BetaBase64ImageSource { data, media_type, type } or BetaURLImageSource { type, url } or BetaFileImageSource { file_id, type }

Accepts one of the following:

BetaBase64ImageSource = object { data, media_type, type }

data: string

media_type: "image/jpeg" or "image/png" or "image/gif" or "image/webp"

Accepts one of the following:

"image/jpeg"

"image/png"

"image/gif"

"image/webp"

type: "base64"

Accepts one of the following:

"base64"

BetaURLImageSource = object { type, url }

type: "url"

Accepts one of the following:

"url"

url: string

BetaFileImageSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

type: "image"

Accepts one of the following:

"image"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

type: "content"

Accepts one of the following:

"content"

BetaURLPDFSource = object { type, url }

type: "url"

Accepts one of the following:

"url"

url: string

BetaFileDocumentSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

type: "document"

Accepts one of the following:

"document"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional BetaCitationsConfigParam { enabled }

enabled: optional boolean

context: optional string

title: optional string

type: "web_fetch_result"

Accepts one of the following:

"web_fetch_result"

url: string

Fetched content URL

retrieved_at: optional string

ISO 8601 timestamp when the content was retrieved

tool_use_id: string

type: "web_fetch_tool_result"

Accepts one of the following:

"web_fetch_tool_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaCodeExecutionToolResultBlockParam = object { content, tool_use_id, type, cache_control }

content: BetaCodeExecutionToolResultBlockParamContent

Accepts one of the following:

BetaCodeExecutionToolResultErrorParam = object { error_code, type }

error_code: BetaCodeExecutionToolResultErrorCode

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

type: "code_execution_tool_result_error"

Accepts one of the following:

"code_execution_tool_result_error"

BetaCodeExecutionResultBlockParam = object { content, return_code, stderr, 2 more }

content: array of BetaCodeExecutionOutputBlockParam { file_id, type }

file_id: string

type: "code_execution_output"

Accepts one of the following:

"code_execution_output"

return_code: number

stderr: string

stdout: string

type: "code_execution_result"

Accepts one of the following:

"code_execution_result"

tool_use_id: string

type: "code_execution_tool_result"

Accepts one of the following:

"code_execution_tool_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaBashCodeExecutionToolResultBlockParam = object { content, tool_use_id, type, cache_control }

content: BetaBashCodeExecutionToolResultErrorParam { error_code, type } or BetaBashCodeExecutionResultBlockParam { content, return_code, stderr, 2 more }

Accepts one of the following:

BetaBashCodeExecutionToolResultErrorParam = object { error_code, type }

error_code: "invalid_tool_input" or "unavailable" or "too_many_requests" or 2 more

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

"output_file_too_large"

type: "bash_code_execution_tool_result_error"

Accepts one of the following:

"bash_code_execution_tool_result_error"

BetaBashCodeExecutionResultBlockParam = object { content, return_code, stderr, 2 more }

content: array of BetaBashCodeExecutionOutputBlockParam { file_id, type }

file_id: string

type: "bash_code_execution_output"

Accepts one of the following:

"bash_code_execution_output"

return_code: number

stderr: string

stdout: string

type: "bash_code_execution_result"

Accepts one of the following:

"bash_code_execution_result"

tool_use_id: string

type: "bash_code_execution_tool_result"

Accepts one of the following:

"bash_code_execution_tool_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaTextEditorCodeExecutionToolResultBlockParam = object { content, tool_use_id, type, cache_control }

content: BetaTextEditorCodeExecutionToolResultErrorParam { error_code, type, error_message } or BetaTextEditorCodeExecutionViewResultBlockParam { content, file_type, type, 3 more } or BetaTextEditorCodeExecutionCreateResultBlockParam { is_file_update, type } or BetaTextEditorCodeExecutionStrReplaceResultBlockParam { type, lines, new_lines, 3 more }

Accepts one of the following:

BetaTextEditorCodeExecutionToolResultErrorParam = object { error_code, type, error_message }

error_code: "invalid_tool_input" or "unavailable" or "too_many_requests" or 2 more

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

"file_not_found"

type: "text_editor_code_execution_tool_result_error"

Accepts one of the following:

"text_editor_code_execution_tool_result_error"

error_message: optional string

BetaTextEditorCodeExecutionViewResultBlockParam = object { content, file_type, type, 3 more }

content: string

file_type: "text" or "image" or "pdf"

Accepts one of the following:

"text"

"image"

"pdf"

type: "text_editor_code_execution_view_result"

Accepts one of the following:

"text_editor_code_execution_view_result"

num_lines: optional number

start_line: optional number

total_lines: optional number

BetaTextEditorCodeExecutionCreateResultBlockParam = object { is_file_update, type }

is_file_update: boolean

type: "text_editor_code_execution_create_result"

Accepts one of the following:

"text_editor_code_execution_create_result"

BetaTextEditorCodeExecutionStrReplaceResultBlockParam = object { type, lines, new_lines, 3 more }

type: "text_editor_code_execution_str_replace_result"

Accepts one of the following:

"text_editor_code_execution_str_replace_result"

lines: optional array of string

new_lines: optional number

new_start: optional number

old_lines: optional number

old_start: optional number

tool_use_id: string

type: "text_editor_code_execution_tool_result"

Accepts one of the following:

"text_editor_code_execution_tool_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaToolSearchToolResultBlockParam = object { content, tool_use_id, type, cache_control }

content: BetaToolSearchToolResultErrorParam { error_code, type } or BetaToolSearchToolSearchResultBlockParam { tool_references, type }

Accepts one of the following:

BetaToolSearchToolResultErrorParam = object { error_code, type }

error_code: "invalid_tool_input" or "unavailable" or "too_many_requests" or "execution_time_exceeded"

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

type: "tool_search_tool_result_error"

Accepts one of the following:

"tool_search_tool_result_error"

BetaToolSearchToolSearchResultBlockParam = object { tool_references, type }

tool_references: array of BetaToolReferenceBlockParam { tool_name, type, cache_control }

tool_name: string

type: "tool_reference"

Accepts one of the following:

"tool_reference"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

type: "tool_search_tool_search_result"

Accepts one of the following:

"tool_search_tool_search_result"

tool_use_id: string

type: "tool_search_tool_result"

Accepts one of the following:

"tool_search_tool_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaMCPToolUseBlockParam = object { id, input, name, 3 more }

id: string

input: map[unknown]

server_name: string

The name of the MCP server

type: "mcp_tool_use"

Accepts one of the following:

"mcp_tool_use"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaRequestMCPToolResultBlockParam = object { tool_use_id, type, cache_control, 2 more }

tool_use_id: string

type: "mcp_tool_result"

Accepts one of the following:

"mcp_tool_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

content: optional string or array of BetaTextBlockParam { text, type, cache_control, citations }

Accepts one of the following:

UnionMember0 = string

BetaMCPToolResultBlockParamContent = array of BetaTextBlockParam { text, type, cache_control, citations }

text: string

type: "text"

Accepts one of the following:

"text"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional array of BetaTextCitationParam

Accepts one of the following:

BetaCitationCharLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationWebSearchResultLocationParam = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocationParam = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

is_error: optional boolean

BetaContainerUploadBlockParam = object { file_id, type, cache_control }

A content block that represents a file to be uploaded to the container Files uploaded via this block will be available in the container's input directory.

file_id: string

type: "container_upload"

Accepts one of the following:

"container_upload"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaContentBlockSource = object { content, type }

content: string or array of BetaContentBlockSourceContent

Accepts one of the following:

UnionMember0 = string

BetaContentBlockSourceContent = array of BetaContentBlockSourceContent

Accepts one of the following:

BetaTextBlockParam = object { text, type, cache_control, citations }

text: string

type: "text"

Accepts one of the following:

"text"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional array of BetaTextCitationParam

Accepts one of the following:

BetaCitationCharLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationWebSearchResultLocationParam = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocationParam = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

BetaImageBlockParam = object { source, type, cache_control }

source: BetaBase64ImageSource { data, media_type, type } or BetaURLImageSource { type, url } or BetaFileImageSource { file_id, type }

Accepts one of the following:

BetaBase64ImageSource = object { data, media_type, type }

data: string

media_type: "image/jpeg" or "image/png" or "image/gif" or "image/webp"

Accepts one of the following:

"image/jpeg"

"image/png"

"image/gif"

"image/webp"

type: "base64"

Accepts one of the following:

"base64"

BetaURLImageSource = object { type, url }

type: "url"

Accepts one of the following:

"url"

url: string

BetaFileImageSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

type: "image"

Accepts one of the following:

"image"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

type: "content"

Accepts one of the following:

"content"

BetaContentBlockSourceContent = BetaTextBlockParam { text, type, cache_control, citations } or BetaImageBlockParam { source, type, cache_control }

Accepts one of the following:

BetaTextBlockParam = object { text, type, cache_control, citations }

text: string

type: "text"

Accepts one of the following:

"text"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional array of BetaTextCitationParam

Accepts one of the following:

BetaCitationCharLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationWebSearchResultLocationParam = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocationParam = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

BetaImageBlockParam = object { source, type, cache_control }

source: BetaBase64ImageSource { data, media_type, type } or BetaURLImageSource { type, url } or BetaFileImageSource { file_id, type }

Accepts one of the following:

BetaBase64ImageSource = object { data, media_type, type }

data: string

media_type: "image/jpeg" or "image/png" or "image/gif" or "image/webp"

Accepts one of the following:

"image/jpeg"

"image/png"

"image/gif"

"image/webp"

type: "base64"

Accepts one of the following:

"base64"

BetaURLImageSource = object { type, url }

type: "url"

Accepts one of the following:

"url"

url: string

BetaFileImageSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

type: "image"

Accepts one of the following:

"image"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaContextManagementConfig = object { edits }

edits: optional array of BetaClearToolUses20250919Edit { type, clear_at_least, clear_tool_inputs, 3 more } or BetaClearThinking20251015Edit { type, keep }

List of context management edits to apply

Accepts one of the following:

BetaClearToolUses20250919Edit = object { type, clear_at_least, clear_tool_inputs, 3 more }

type: "clear_tool_uses_20250919"

Accepts one of the following:

"clear_tool_uses_20250919"

clear_at_least: optional BetaInputTokensClearAtLeast { type, value }

Minimum number of tokens that must be cleared when triggered. Context will only be modified if at least this many tokens can be removed.

type: "input_tokens"

Accepts one of the following:

"input_tokens"

value: number

clear_tool_inputs: optional boolean or array of string

Whether to clear all tool inputs (bool) or specific tool inputs to clear (list)

Accepts one of the following:

UnionMember0 = boolean

UnionMember1 = array of string

exclude_tools: optional array of string

Tool names whose uses are preserved from clearing

keep: optional BetaToolUsesKeep { type, value }

Number of tool uses to retain in the conversation

type: "tool_uses"

Accepts one of the following:

"tool_uses"

value: number

trigger: optional BetaInputTokensTrigger { type, value } or BetaToolUsesTrigger { type, value }

Condition that triggers the context management strategy

Accepts one of the following:

BetaInputTokensTrigger = object { type, value }

type: "input_tokens"

Accepts one of the following:

"input_tokens"

value: number

BetaToolUsesTrigger = object { type, value }

type: "tool_uses"

Accepts one of the following:

"tool_uses"

value: number

BetaClearThinking20251015Edit = object { type, keep }

type: "clear_thinking_20251015"

Accepts one of the following:

"clear_thinking_20251015"

keep: optional BetaThinkingTurns { type, value } or BetaAllThinkingTurns { type } or "all"

Number of most recent assistant turns to keep thinking blocks for. Older turns will have their thinking blocks removed.

Accepts one of the following:

BetaThinkingTurns = object { type, value }

type: "thinking_turns"

Accepts one of the following:

"thinking_turns"

value: number

BetaAllThinkingTurns = object { type }

type: "all"

Accepts one of the following:

"all"

UnionMember2 = "all"

Accepts one of the following:

"all"

BetaContextManagementResponse = object { applied_edits }

applied_edits: array of BetaClearToolUses20250919EditResponse { cleared_input_tokens, cleared_tool_uses, type } or BetaClearThinking20251015EditResponse { cleared_input_tokens, cleared_thinking_turns, type }

List of context management edits that were applied.

Accepts one of the following:

BetaClearToolUses20250919EditResponse = object { cleared_input_tokens, cleared_tool_uses, type }

cleared_input_tokens: number

Number of input tokens cleared by this edit.

minimum0

cleared_tool_uses: number

Number of tool uses that were cleared.

minimum0

type: "clear_tool_uses_20250919"

The type of context management edit applied.

Accepts one of the following:

"clear_tool_uses_20250919"

BetaClearThinking20251015EditResponse = object { cleared_input_tokens, cleared_thinking_turns, type }

cleared_input_tokens: number

Number of input tokens cleared by this edit.

minimum0

cleared_thinking_turns: number

Number of thinking turns that were cleared.

minimum0

type: "clear_thinking_20251015"

The type of context management edit applied.

Accepts one of the following:

"clear_thinking_20251015"

BetaCountTokensContextManagementResponse = object { original_input_tokens }

original_input_tokens: number

The original token count before context management was applied

BetaDirectCaller = object { type }

Tool invocation directly from the model.

type: "direct"

Accepts one of the following:

"direct"

BetaDocumentBlock = object { citations, source, title, type }

citations: BetaCitationConfig { enabled }

Citation configuration for the document

enabled: boolean

source: BetaBase64PDFSource { data, media_type, type } or BetaPlainTextSource { data, media_type, type }

Accepts one of the following:

BetaBase64PDFSource = object { data, media_type, type }

data: string

media_type: "application/pdf"

Accepts one of the following:

"application/pdf"

type: "base64"

Accepts one of the following:

"base64"

BetaPlainTextSource = object { data, media_type, type }

data: string

media_type: "text/plain"

Accepts one of the following:

"text/plain"

type: "text"

Accepts one of the following:

"text"

title: string

The title of the document

type: "document"

Accepts one of the following:

"document"

BetaFileDocumentSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

BetaFileImageSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

BetaImageBlockParam = object { source, type, cache_control }

source: BetaBase64ImageSource { data, media_type, type } or BetaURLImageSource { type, url } or BetaFileImageSource { file_id, type }

Accepts one of the following:

BetaBase64ImageSource = object { data, media_type, type }

data: string

media_type: "image/jpeg" or "image/png" or "image/gif" or "image/webp"

Accepts one of the following:

"image/jpeg"

"image/png"

"image/gif"

"image/webp"

type: "base64"

Accepts one of the following:

"base64"

BetaURLImageSource = object { type, url }

type: "url"

Accepts one of the following:

"url"

url: string

BetaFileImageSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

type: "image"

Accepts one of the following:

"image"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaInputJSONDelta = object { partial_json, type }

partial_json: string

type: "input_json_delta"

Accepts one of the following:

"input_json_delta"

BetaInputTokensClearAtLeast = object { type, value }

type: "input_tokens"

Accepts one of the following:

"input_tokens"

value: number

BetaInputTokensTrigger = object { type, value }

type: "input_tokens"

Accepts one of the following:

"input_tokens"

value: number

BetaJSONOutputFormat = object { schema, type }

schema: map[unknown]

The JSON schema of the format

type: "json_schema"

Accepts one of the following:

"json_schema"

BetaMCPToolConfig = object { defer_loading, enabled }

Configuration for a specific tool in an MCP toolset.

defer_loading: optional boolean

enabled: optional boolean

BetaMCPToolDefaultConfig = object { defer_loading, enabled }

Default configuration for tools in an MCP toolset.

defer_loading: optional boolean

enabled: optional boolean

BetaMCPToolResultBlock = object { content, is_error, tool_use_id, type }

content: string or array of BetaTextBlock { citations, text, type }

Accepts one of the following:

UnionMember0 = string

BetaMCPToolResultBlockContent = array of BetaTextBlock { citations, text, type }

citations: array of BetaTextCitation

Citations supporting the text block.

Accepts one of the following:

BetaCitationCharLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

file_id: string

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

file_id: string

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

file_id: string

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationsWebSearchResultLocation = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocation = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

text: string

type: "text"

Accepts one of the following:

"text"

is_error: boolean

tool_use_id: string

type: "mcp_tool_result"

Accepts one of the following:

"mcp_tool_result"

BetaMCPToolUseBlock = object { id, input, name, 2 more }

id: string

input: map[unknown]

The name of the MCP tool

server_name: string

The name of the MCP server

type: "mcp_tool_use"

Accepts one of the following:

"mcp_tool_use"

BetaMCPToolUseBlockParam = object { id, input, name, 3 more }

id: string

input: map[unknown]

server_name: string

The name of the MCP server

type: "mcp_tool_use"

Accepts one of the following:

"mcp_tool_use"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaMCPToolset = object { mcp_server_name, type, cache_control, 2 more }

Configuration for a group of tools from an MCP server.

Allows configuring enabled status and defer_loading for all tools from an MCP server, with optional per-tool overrides.

mcp_server_name: string

Name of the MCP server to configure tools for

maxLength255

minLength1

type: "mcp_toolset"

Accepts one of the following:

"mcp_toolset"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

configs: optional map[BetaMCPToolConfig { defer_loading, enabled } ]

Configuration overrides for specific tools, keyed by tool name

defer_loading: optional boolean

enabled: optional boolean

default_config: optional BetaMCPToolDefaultConfig { defer_loading, enabled }

Default configuration applied to all tools from this server

defer_loading: optional boolean

enabled: optional boolean

BetaMemoryTool20250818 = object { name, type, allowed_callers, 4 more }

Name of the tool.

This is how the tool will be called by the model and in tool_use blocks.

Accepts one of the following:

"memory"

type: "memory_20250818"

Accepts one of the following:

"memory_20250818"

allowed_callers: optional array of "direct" or "code_execution_20250825"

Accepts one of the following:

"direct"

"code_execution_20250825"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

defer_loading: optional boolean

If true, tool will not be included in initial system prompt. Only loaded when returned via tool_reference from tool search.

input_examples: optional array of map[unknown]

strict: optional boolean

BetaMemoryTool20250818Command = BetaMemoryTool20250818ViewCommand { command, path, view_range } or BetaMemoryTool20250818CreateCommand { command, file_text, path } or BetaMemoryTool20250818StrReplaceCommand { command, new_str, old_str, path } or 3 more

Accepts one of the following:

BetaMemoryTool20250818ViewCommand = object { command, path, view_range }

command: "view"

Command type identifier

Accepts one of the following:

"view"

path: string

Path to directory or file to view

view_range: optional array of number

Optional line range for viewing specific lines

BetaMemoryTool20250818CreateCommand = object { command, file_text, path }

command: "create"

Command type identifier

Accepts one of the following:

"create"

file_text: string

Content to write to the file

path: string

Path where the file should be created

BetaMemoryTool20250818StrReplaceCommand = object { command, new_str, old_str, path }

command: "str_replace"

Command type identifier

Accepts one of the following:

"str_replace"

new_str: string

Text to replace with

old_str: string

Text to search for and replace

path: string

Path to the file where text should be replaced

BetaMemoryTool20250818InsertCommand = object { command, insert_line, insert_text, path }

command: "insert"

Command type identifier

Accepts one of the following:

"insert"

insert_line: number

Line number where text should be inserted

minimum1

insert_text: string

Text to insert at the specified line

path: string

Path to the file where text should be inserted

BetaMemoryTool20250818DeleteCommand = object { command, path }

command: "delete"

Command type identifier

Accepts one of the following:

"delete"

path: string

Path to the file or directory to delete

BetaMemoryTool20250818RenameCommand = object { command, new_path, old_path }

command: "rename"

Command type identifier

Accepts one of the following:

"rename"

new_path: string

New path for the file or directory

old_path: string

Current path of the file or directory

BetaMemoryTool20250818CreateCommand = object { command, file_text, path }

command: "create"

Command type identifier

Accepts one of the following:

"create"

file_text: string

Content to write to the file

path: string

Path where the file should be created

BetaMemoryTool20250818DeleteCommand = object { command, path }

command: "delete"

Command type identifier

Accepts one of the following:

"delete"

path: string

Path to the file or directory to delete

BetaMemoryTool20250818InsertCommand = object { command, insert_line, insert_text, path }

command: "insert"

Command type identifier

Accepts one of the following:

"insert"

insert_line: number

Line number where text should be inserted

minimum1

insert_text: string

Text to insert at the specified line

path: string

Path to the file where text should be inserted

BetaMemoryTool20250818RenameCommand = object { command, new_path, old_path }

command: "rename"

Command type identifier

Accepts one of the following:

"rename"

new_path: string

New path for the file or directory

old_path: string

Current path of the file or directory

BetaMemoryTool20250818StrReplaceCommand = object { command, new_str, old_str, path }

command: "str_replace"

Command type identifier

Accepts one of the following:

"str_replace"

new_str: string

Text to replace with

old_str: string

Text to search for and replace

path: string

Path to the file where text should be replaced

BetaMemoryTool20250818ViewCommand = object { command, path, view_range }

command: "view"

Command type identifier

Accepts one of the following:

"view"

path: string

Path to directory or file to view

view_range: optional array of number

Optional line range for viewing specific lines

BetaMessage = object { id, container, content, 7 more }

id: string

Unique object identifier.

The format and length of IDs may change over time.

container: BetaContainer { id, expires_at, skills }

Information about the container used in the request (for the code execution tool)

id: string

Identifier for the container used in this request

expires_at: string

The time at which the container will expire.

formatdate-time

skills: array of BetaSkill { skill_id, type, version }

Skills loaded in the container

skill_id: string

Skill ID

maxLength64

minLength1

type: "anthropic" or "custom"

Type of skill - either 'anthropic' (built-in) or 'custom' (user-defined)

Accepts one of the following:

"anthropic"

"custom"

version: string

Skill version or 'latest' for most recent version

maxLength64

minLength1

content: array of BetaContentBlock

Content generated by the model.

This is an array of content blocks, each of which has a type that determines its shape.

Example:

[{"type": "text", "text": "Hi, I'm Claude."}]

If the request input messages ended with an assistant turn, then the response content will continue directly from that last turn. You can use this to constrain the model's output.

For example, if the input messages were:

[
  {"role": "user", "content": "What's the Greek name for Sun? (A) Sol (B) Helios (C) Sun"},
  {"role": "assistant", "content": "The best answer is ("}
]

Then the response content might be:

[{"type": "text", "text": "B)"}]

Accepts one of the following:

BetaTextBlock = object { citations, text, type }

citations: array of BetaTextCitation

Citations supporting the text block.

Accepts one of the following:

BetaCitationCharLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

file_id: string

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

file_id: string

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

file_id: string

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationsWebSearchResultLocation = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocation = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

text: string

type: "text"

Accepts one of the following:

"text"

BetaThinkingBlock = object { signature, thinking, type }

signature: string

thinking: string

type: "thinking"

Accepts one of the following:

"thinking"

BetaRedactedThinkingBlock = object { data, type }

data: string

type: "redacted_thinking"

Accepts one of the following:

"redacted_thinking"

BetaToolUseBlock = object { id, input, name, 2 more }

id: string

input: map[unknown]

type: "tool_use"

Accepts one of the following:

"tool_use"

caller: optional BetaDirectCaller { type } or BetaServerToolCaller { tool_id, type }

Tool invocation directly from the model.

Accepts one of the following:

BetaDirectCaller = object { type }

Tool invocation directly from the model.

type: "direct"

Accepts one of the following:

"direct"

BetaServerToolCaller = object { tool_id, type }

Tool invocation generated by a server-side tool.

tool_id: string

type: "code_execution_20250825"

Accepts one of the following:

"code_execution_20250825"

BetaServerToolUseBlock = object { id, caller, input, 2 more }

id: string

caller: BetaDirectCaller { type } or BetaServerToolCaller { tool_id, type }

Tool invocation directly from the model.

Accepts one of the following:

BetaDirectCaller = object { type }

Tool invocation directly from the model.

type: "direct"

Accepts one of the following:

"direct"

BetaServerToolCaller = object { tool_id, type }

Tool invocation generated by a server-side tool.

tool_id: string

type: "code_execution_20250825"

Accepts one of the following:

"code_execution_20250825"

input: map[unknown]

Accepts one of the following:

"web_search"

"web_fetch"

"code_execution"

"bash_code_execution"

"text_editor_code_execution"

"tool_search_tool_regex"

"tool_search_tool_bm25"

type: "server_tool_use"

Accepts one of the following:

"server_tool_use"

BetaWebSearchToolResultBlock = object { content, tool_use_id, type }

content: BetaWebSearchToolResultBlockContent

Accepts one of the following:

BetaWebSearchToolResultError = object { error_code, type }

error_code: BetaWebSearchToolResultErrorCode

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"max_uses_exceeded"

"too_many_requests"

"query_too_long"

type: "web_search_tool_result_error"

Accepts one of the following:

"web_search_tool_result_error"

UnionMember1 = array of BetaWebSearchResultBlock { encrypted_content, page_age, title, 2 more }

encrypted_content: string

page_age: string

title: string

type: "web_search_result"

Accepts one of the following:

"web_search_result"

url: string

tool_use_id: string

type: "web_search_tool_result"

Accepts one of the following:

"web_search_tool_result"

BetaWebFetchToolResultBlock = object { content, tool_use_id, type }

content: BetaWebFetchToolResultErrorBlock { error_code, type } or BetaWebFetchBlock { content, retrieved_at, type, url }

Accepts one of the following:

BetaWebFetchToolResultErrorBlock = object { error_code, type }

error_code: BetaWebFetchToolResultErrorCode

Accepts one of the following:

"invalid_tool_input"

"url_too_long"

"url_not_allowed"

"url_not_accessible"

"unsupported_content_type"

"too_many_requests"

"max_uses_exceeded"

"unavailable"

type: "web_fetch_tool_result_error"

Accepts one of the following:

"web_fetch_tool_result_error"

BetaWebFetchBlock = object { content, retrieved_at, type, url }

content: BetaDocumentBlock { citations, source, title, type }

citations: BetaCitationConfig { enabled }

Citation configuration for the document

enabled: boolean

source: BetaBase64PDFSource { data, media_type, type } or BetaPlainTextSource { data, media_type, type }

Accepts one of the following:

BetaBase64PDFSource = object { data, media_type, type }

data: string

media_type: "application/pdf"

Accepts one of the following:

"application/pdf"

type: "base64"

Accepts one of the following:

"base64"

BetaPlainTextSource = object { data, media_type, type }

data: string

media_type: "text/plain"

Accepts one of the following:

"text/plain"

type: "text"

Accepts one of the following:

"text"

title: string

The title of the document

type: "document"

Accepts one of the following:

"document"

retrieved_at: string

ISO 8601 timestamp when the content was retrieved

type: "web_fetch_result"

Accepts one of the following:

"web_fetch_result"

url: string

Fetched content URL

tool_use_id: string

type: "web_fetch_tool_result"

Accepts one of the following:

"web_fetch_tool_result"

BetaCodeExecutionToolResultBlock = object { content, tool_use_id, type }

content: BetaCodeExecutionToolResultBlockContent

Accepts one of the following:

BetaCodeExecutionToolResultError = object { error_code, type }

error_code: BetaCodeExecutionToolResultErrorCode

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

type: "code_execution_tool_result_error"

Accepts one of the following:

"code_execution_tool_result_error"

BetaCodeExecutionResultBlock = object { content, return_code, stderr, 2 more }

content: array of BetaCodeExecutionOutputBlock { file_id, type }

file_id: string

type: "code_execution_output"

Accepts one of the following:

"code_execution_output"

return_code: number

stderr: string

stdout: string

type: "code_execution_result"

Accepts one of the following:

"code_execution_result"

tool_use_id: string

type: "code_execution_tool_result"

Accepts one of the following:

"code_execution_tool_result"

BetaBashCodeExecutionToolResultBlock = object { content, tool_use_id, type }

content: BetaBashCodeExecutionToolResultError { error_code, type } or BetaBashCodeExecutionResultBlock { content, return_code, stderr, 2 more }

Accepts one of the following:

BetaBashCodeExecutionToolResultError = object { error_code, type }

error_code: "invalid_tool_input" or "unavailable" or "too_many_requests" or 2 more

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

"output_file_too_large"

type: "bash_code_execution_tool_result_error"

Accepts one of the following:

"bash_code_execution_tool_result_error"

BetaBashCodeExecutionResultBlock = object { content, return_code, stderr, 2 more }

content: array of BetaBashCodeExecutionOutputBlock { file_id, type }

file_id: string

type: "bash_code_execution_output"

Accepts one of the following:

"bash_code_execution_output"

return_code: number

stderr: string

stdout: string

type: "bash_code_execution_result"

Accepts one of the following:

"bash_code_execution_result"

tool_use_id: string

type: "bash_code_execution_tool_result"

Accepts one of the following:

"bash_code_execution_tool_result"

BetaTextEditorCodeExecutionToolResultBlock = object { content, tool_use_id, type }

Accepts one of the following:

BetaTextEditorCodeExecutionToolResultError = object { error_code, error_message, type }

error_code: "invalid_tool_input" or "unavailable" or "too_many_requests" or 2 more

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

"file_not_found"

error_message: string

type: "text_editor_code_execution_tool_result_error"

Accepts one of the following:

"text_editor_code_execution_tool_result_error"

BetaTextEditorCodeExecutionViewResultBlock = object { content, file_type, num_lines, 3 more }

content: string

file_type: "text" or "image" or "pdf"

Accepts one of the following:

"text"

"image"

"pdf"

num_lines: number

start_line: number

total_lines: number

type: "text_editor_code_execution_view_result"

Accepts one of the following:

"text_editor_code_execution_view_result"

BetaTextEditorCodeExecutionCreateResultBlock = object { is_file_update, type }

is_file_update: boolean

type: "text_editor_code_execution_create_result"

Accepts one of the following:

"text_editor_code_execution_create_result"

BetaTextEditorCodeExecutionStrReplaceResultBlock = object { lines, new_lines, new_start, 3 more }

lines: array of string

new_lines: number

new_start: number

old_lines: number

old_start: number

type: "text_editor_code_execution_str_replace_result"

Accepts one of the following:

"text_editor_code_execution_str_replace_result"

tool_use_id: string

type: "text_editor_code_execution_tool_result"

Accepts one of the following:

"text_editor_code_execution_tool_result"

BetaToolSearchToolResultBlock = object { content, tool_use_id, type }

content: BetaToolSearchToolResultError { error_code, error_message, type } or BetaToolSearchToolSearchResultBlock { tool_references, type }

Accepts one of the following:

BetaToolSearchToolResultError = object { error_code, error_message, type }

error_code: "invalid_tool_input" or "unavailable" or "too_many_requests" or "execution_time_exceeded"

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

error_message: string

type: "tool_search_tool_result_error"

Accepts one of the following:

"tool_search_tool_result_error"

BetaToolSearchToolSearchResultBlock = object { tool_references, type }

tool_references: array of BetaToolReferenceBlock { tool_name, type }

tool_name: string

type: "tool_reference"

Accepts one of the following:

"tool_reference"

type: "tool_search_tool_search_result"

Accepts one of the following:

"tool_search_tool_search_result"

tool_use_id: string

type: "tool_search_tool_result"

Accepts one of the following:

"tool_search_tool_result"

BetaMCPToolUseBlock = object { id, input, name, 2 more }

id: string

input: map[unknown]

The name of the MCP tool

server_name: string

The name of the MCP server

type: "mcp_tool_use"

Accepts one of the following:

"mcp_tool_use"

BetaMCPToolResultBlock = object { content, is_error, tool_use_id, type }

content: string or array of BetaTextBlock { citations, text, type }

Accepts one of the following:

UnionMember0 = string

BetaMCPToolResultBlockContent = array of BetaTextBlock { citations, text, type }

citations: array of BetaTextCitation

Citations supporting the text block.

Accepts one of the following:

BetaCitationCharLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

file_id: string

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

file_id: string

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocation = object { cited_text, document_index, document_title, 4 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

file_id: string

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationsWebSearchResultLocation = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocation = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

text: string

type: "text"

Accepts one of the following:

"text"

is_error: boolean

tool_use_id: string

type: "mcp_tool_result"

Accepts one of the following:

"mcp_tool_result"

BetaContainerUploadBlock = object { file_id, type }

Response model for a file uploaded to the container.

file_id: string

type: "container_upload"

Accepts one of the following:

"container_upload"

context_management: BetaContextManagementResponse { applied_edits }

Context management response.

Information about context management strategies applied during the request.

List of context management edits that were applied.

Accepts one of the following:

BetaClearToolUses20250919EditResponse = object { cleared_input_tokens, cleared_tool_uses, type }

cleared_input_tokens: number

Number of input tokens cleared by this edit.

minimum0

cleared_tool_uses: number

Number of tool uses that were cleared.

minimum0

type: "clear_tool_uses_20250919"

The type of context management edit applied.

Accepts one of the following:

"clear_tool_uses_20250919"

BetaClearThinking20251015EditResponse = object { cleared_input_tokens, cleared_thinking_turns, type }

cleared_input_tokens: number

Number of input tokens cleared by this edit.

minimum0

cleared_thinking_turns: number

Number of thinking turns that were cleared.

minimum0

type: "clear_thinking_20251015"

The type of context management edit applied.

Accepts one of the following:

"clear_thinking_20251015"

model: Model

The model that will complete your prompt.

See models for additional details and options.

Accepts one of the following:

UnionMember0 = "claude-opus-4-5-20251101" or "claude-opus-4-5" or "claude-3-7-sonnet-latest" or 17 more

The model that will complete your prompt.

See models for additional details and options.

Accepts one of the following:

"claude-opus-4-5-20251101"

Premium model combining maximum intelligence with practical performance

"claude-opus-4-5"

Premium model combining maximum intelligence with practical performance

"claude-3-7-sonnet-latest"

High-performance model with early extended thinking

"claude-3-7-sonnet-20250219"

High-performance model with early extended thinking

"claude-3-5-haiku-latest"

Fastest and most compact model for near-instant responsiveness

"claude-3-5-haiku-20241022"

Our fastest model

"claude-haiku-4-5"

Hybrid model, capable of near-instant responses and extended thinking

"claude-haiku-4-5-20251001"

Hybrid model, capable of near-instant responses and extended thinking

"claude-sonnet-4-20250514"

High-performance model with extended thinking

"claude-sonnet-4-0"

High-performance model with extended thinking

"claude-4-sonnet-20250514"

High-performance model with extended thinking

"claude-sonnet-4-5"

Our best model for real-world agents and coding

"claude-sonnet-4-5-20250929"

Our best model for real-world agents and coding

"claude-opus-4-0"

Our most capable model

"claude-opus-4-20250514"

Our most capable model

"claude-4-opus-20250514"

Our most capable model

"claude-opus-4-1-20250805"

Our most capable model

"claude-3-opus-latest"

Excels at writing and complex tasks

"claude-3-opus-20240229"

Excels at writing and complex tasks

"claude-3-haiku-20240307"

Our previous most fast and cost-effective

UnionMember1 = string

role: "assistant"

Conversational role of the generated message.

This will always be "assistant".

Accepts one of the following:

"assistant"

stop_reason: BetaStopReason

The reason that we stopped.

This may be one the following values:

"end_turn": the model reached a natural stopping point
"max_tokens": we exceeded the requested max_tokens or the model's maximum
"stop_sequence": one of your provided custom stop_sequences was generated
"tool_use": the model invoked one or more tools
"pause_turn": we paused a long-running turn. You may provide the response back as-is in a subsequent request to let the model continue.
"refusal": when streaming classifiers intervene to handle potential policy violations

In non-streaming mode this value is always non-null. In streaming mode, it is null in the message_start event and non-null otherwise.

Accepts one of the following:

"end_turn"

"max_tokens"

"stop_sequence"

"tool_use"

"pause_turn"

"refusal"

"model_context_window_exceeded"

stop_sequence: string

Which custom stop sequence was generated, if any.

This value will be a non-null string if one of your custom stop sequences was generated.

type: "message"

Object type.

For Messages, this is always "message".

Accepts one of the following:

"message"

usage: BetaUsage { cache_creation, cache_creation_input_tokens, cache_read_input_tokens, 4 more }

Billing and rate-limit usage.

Anthropic's API bills and rate-limits by token counts, as tokens represent the underlying cost to our systems.

Under the hood, the API transforms requests into a format suitable for the model. The model's output then goes through a parsing stage before becoming an API response. As a result, the token counts in usage will not match one-to-one with the exact visible content of an API request or response.

For example, output_tokens will be non-zero, even for an empty string response from Claude.

Total input tokens in a request is the summation of input_tokens, cache_creation_input_tokens, and cache_read_input_tokens.

cache_creation: BetaCacheCreation { ephemeral_1h_input_tokens, ephemeral_5m_input_tokens }

Breakdown of cached tokens by TTL

ephemeral_1h_input_tokens: number

The number of input tokens used to create the 1 hour cache entry.

minimum0

ephemeral_5m_input_tokens: number

The number of input tokens used to create the 5 minute cache entry.

minimum0

cache_creation_input_tokens: number

The number of input tokens used to create the cache entry.

minimum0

cache_read_input_tokens: number

The number of input tokens read from the cache.

minimum0

input_tokens: number

The number of input tokens which were used.

minimum0

output_tokens: number

The number of output tokens which were used.

minimum0

server_tool_use: BetaServerToolUsage { web_fetch_requests, web_search_requests }

The number of server tool requests.

web_fetch_requests: number

The number of web fetch tool requests.

minimum0

web_search_requests: number

The number of web search tool requests.

minimum0

service_tier: "standard" or "priority" or "batch"

If the request used the priority, standard, or batch tier.

Accepts one of the following:

"standard"

"priority"

"batch"

BetaMessageDeltaUsage = object { cache_creation_input_tokens, cache_read_input_tokens, input_tokens, 2 more }

cache_creation_input_tokens: number

The cumulative number of input tokens used to create the cache entry.

minimum0

cache_read_input_tokens: number

The cumulative number of input tokens read from the cache.

minimum0

input_tokens: number

The cumulative number of input tokens which were used.

minimum0

output_tokens: number

The cumulative number of output tokens which were used.

server_tool_use: BetaServerToolUsage { web_fetch_requests, web_search_requests }

The number of server tool requests.

web_fetch_requests: number

The number of web fetch tool requests.

minimum0

web_search_requests: number

The number of web search tool requests.

minimum0

BetaMessageParam = object { content, role }

content: string or array of BetaContentBlockParam

Accepts one of the following:

UnionMember0 = string

UnionMember1 = array of BetaContentBlockParam

Accepts one of the following:

BetaTextBlockParam = object { text, type, cache_control, citations }

text: string

type: "text"

Accepts one of the following:

"text"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional array of BetaTextCitationParam

Accepts one of the following:

BetaCitationCharLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationWebSearchResultLocationParam = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocationParam = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

BetaImageBlockParam = object { source, type, cache_control }

source: BetaBase64ImageSource { data, media_type, type } or BetaURLImageSource { type, url } or BetaFileImageSource { file_id, type }

Accepts one of the following:

BetaBase64ImageSource = object { data, media_type, type }

data: string

media_type: "image/jpeg" or "image/png" or "image/gif" or "image/webp"

Accepts one of the following:

"image/jpeg"

"image/png"

"image/gif"

"image/webp"

type: "base64"

Accepts one of the following:

"base64"

BetaURLImageSource = object { type, url }

type: "url"

Accepts one of the following:

"url"

url: string

BetaFileImageSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

type: "image"

Accepts one of the following:

"image"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaRequestDocumentBlock = object { source, type, cache_control, 3 more }

source: BetaBase64PDFSource { data, media_type, type } or BetaPlainTextSource { data, media_type, type } or BetaContentBlockSource { content, type } or 2 more

Accepts one of the following:

BetaBase64PDFSource = object { data, media_type, type }

data: string

media_type: "application/pdf"

Accepts one of the following:

"application/pdf"

type: "base64"

Accepts one of the following:

"base64"

BetaPlainTextSource = object { data, media_type, type }

data: string

media_type: "text/plain"

Accepts one of the following:

"text/plain"

type: "text"

Accepts one of the following:

"text"

BetaContentBlockSource = object { content, type }

content: string or array of BetaContentBlockSourceContent

Accepts one of the following:

UnionMember0 = string

BetaContentBlockSourceContent = array of BetaContentBlockSourceContent

Accepts one of the following:

BetaTextBlockParam = object { text, type, cache_control, citations }

text: string

type: "text"

Accepts one of the following:

"text"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional array of BetaTextCitationParam

Accepts one of the following:

BetaCitationCharLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationWebSearchResultLocationParam = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocationParam = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

BetaImageBlockParam = object { source, type, cache_control }

source: BetaBase64ImageSource { data, media_type, type } or BetaURLImageSource { type, url } or BetaFileImageSource { file_id, type }

Accepts one of the following:

BetaBase64ImageSource = object { data, media_type, type }

data: string

media_type: "image/jpeg" or "image/png" or "image/gif" or "image/webp"

Accepts one of the following:

"image/jpeg"

"image/png"

"image/gif"

"image/webp"

type: "base64"

Accepts one of the following:

"base64"

BetaURLImageSource = object { type, url }

type: "url"

Accepts one of the following:

"url"

url: string

BetaFileImageSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

type: "image"

Accepts one of the following:

"image"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

type: "content"

Accepts one of the following:

"content"

BetaURLPDFSource = object { type, url }

type: "url"

Accepts one of the following:

"url"

url: string

BetaFileDocumentSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

type: "document"

Accepts one of the following:

"document"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional BetaCitationsConfigParam { enabled }

enabled: optional boolean

context: optional string

title: optional string

BetaSearchResultBlockParam = object { content, source, title, 3 more }

content: array of BetaTextBlockParam { text, type, cache_control, citations }

text: string

type: "text"

Accepts one of the following:

"text"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional array of BetaTextCitationParam

Accepts one of the following:

BetaCitationCharLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationWebSearchResultLocationParam = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocationParam = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

source: string

title: string

type: "search_result"

Accepts one of the following:

"search_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional BetaCitationsConfigParam { enabled }

enabled: optional boolean

BetaThinkingBlockParam = object { signature, thinking, type }

signature: string

thinking: string

type: "thinking"

Accepts one of the following:

"thinking"

BetaRedactedThinkingBlockParam = object { data, type }

data: string

type: "redacted_thinking"

Accepts one of the following:

"redacted_thinking"

BetaToolUseBlockParam = object { id, input, name, 3 more }

id: string

input: map[unknown]

type: "tool_use"

Accepts one of the following:

"tool_use"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

caller: optional BetaDirectCaller { type } or BetaServerToolCaller { tool_id, type }

Tool invocation directly from the model.

Accepts one of the following:

BetaDirectCaller = object { type }

Tool invocation directly from the model.

type: "direct"

Accepts one of the following:

"direct"

BetaServerToolCaller = object { tool_id, type }

Tool invocation generated by a server-side tool.

tool_id: string

type: "code_execution_20250825"

Accepts one of the following:

"code_execution_20250825"

BetaToolResultBlockParam = object { tool_use_id, type, cache_control, 2 more }

tool_use_id: string

type: "tool_result"

Accepts one of the following:

"tool_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

Accepts one of the following:

UnionMember0 = string

Accepts one of the following:

BetaTextBlockParam = object { text, type, cache_control, citations }

text: string

type: "text"

Accepts one of the following:

"text"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional array of BetaTextCitationParam

Accepts one of the following:

BetaCitationCharLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationWebSearchResultLocationParam = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocationParam = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

BetaImageBlockParam = object { source, type, cache_control }

source: BetaBase64ImageSource { data, media_type, type } or BetaURLImageSource { type, url } or BetaFileImageSource { file_id, type }

Accepts one of the following:

BetaBase64ImageSource = object { data, media_type, type }

data: string

media_type: "image/jpeg" or "image/png" or "image/gif" or "image/webp"

Accepts one of the following:

"image/jpeg"

"image/png"

"image/gif"

"image/webp"

type: "base64"

Accepts one of the following:

"base64"

BetaURLImageSource = object { type, url }

type: "url"

Accepts one of the following:

"url"

url: string

BetaFileImageSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

type: "image"

Accepts one of the following:

"image"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaSearchResultBlockParam = object { content, source, title, 3 more }

content: array of BetaTextBlockParam { text, type, cache_control, citations }

text: string

type: "text"

Accepts one of the following:

"text"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional array of BetaTextCitationParam

Accepts one of the following:

BetaCitationCharLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationWebSearchResultLocationParam = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocationParam = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

source: string

title: string

type: "search_result"

Accepts one of the following:

"search_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional BetaCitationsConfigParam { enabled }

enabled: optional boolean

BetaRequestDocumentBlock = object { source, type, cache_control, 3 more }

source: BetaBase64PDFSource { data, media_type, type } or BetaPlainTextSource { data, media_type, type } or BetaContentBlockSource { content, type } or 2 more

Accepts one of the following:

BetaBase64PDFSource = object { data, media_type, type }

data: string

media_type: "application/pdf"

Accepts one of the following:

"application/pdf"

type: "base64"

Accepts one of the following:

"base64"

BetaPlainTextSource = object { data, media_type, type }

data: string

media_type: "text/plain"

Accepts one of the following:

"text/plain"

type: "text"

Accepts one of the following:

"text"

BetaContentBlockSource = object { content, type }

content: string or array of BetaContentBlockSourceContent

Accepts one of the following:

UnionMember0 = string

BetaContentBlockSourceContent = array of BetaContentBlockSourceContent

Accepts one of the following:

BetaTextBlockParam = object { text, type, cache_control, citations }

text: string

type: "text"

Accepts one of the following:

"text"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional array of BetaTextCitationParam

Accepts one of the following:

BetaCitationCharLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationWebSearchResultLocationParam = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocationParam = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

BetaImageBlockParam = object { source, type, cache_control }

source: BetaBase64ImageSource { data, media_type, type } or BetaURLImageSource { type, url } or BetaFileImageSource { file_id, type }

Accepts one of the following:

BetaBase64ImageSource = object { data, media_type, type }

data: string

media_type: "image/jpeg" or "image/png" or "image/gif" or "image/webp"

Accepts one of the following:

"image/jpeg"

"image/png"

"image/gif"

"image/webp"

type: "base64"

Accepts one of the following:

"base64"

BetaURLImageSource = object { type, url }

type: "url"

Accepts one of the following:

"url"

url: string

BetaFileImageSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

type: "image"

Accepts one of the following:

"image"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

type: "content"

Accepts one of the following:

"content"

BetaURLPDFSource = object { type, url }

type: "url"

Accepts one of the following:

"url"

url: string

BetaFileDocumentSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

type: "document"

Accepts one of the following:

"document"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional BetaCitationsConfigParam { enabled }

enabled: optional boolean

context: optional string

title: optional string

BetaToolReferenceBlockParam = object { tool_name, type, cache_control }

Tool reference block that can be included in tool_result content.

tool_name: string

type: "tool_reference"

Accepts one of the following:

"tool_reference"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

is_error: optional boolean

BetaServerToolUseBlockParam = object { id, input, name, 3 more }

id: string

input: map[unknown]

Accepts one of the following:

"web_search"

"web_fetch"

"code_execution"

"bash_code_execution"

"text_editor_code_execution"

"tool_search_tool_regex"

"tool_search_tool_bm25"

type: "server_tool_use"

Accepts one of the following:

"server_tool_use"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

caller: optional BetaDirectCaller { type } or BetaServerToolCaller { tool_id, type }

Tool invocation directly from the model.

Accepts one of the following:

BetaDirectCaller = object { type }

Tool invocation directly from the model.

type: "direct"

Accepts one of the following:

"direct"

BetaServerToolCaller = object { tool_id, type }

Tool invocation generated by a server-side tool.

tool_id: string

type: "code_execution_20250825"

Accepts one of the following:

"code_execution_20250825"

BetaWebSearchToolResultBlockParam = object { content, tool_use_id, type, cache_control }

content: BetaWebSearchToolResultBlockParamContent

Accepts one of the following:

ResultBlock = array of BetaWebSearchResultBlockParam { encrypted_content, title, type, 2 more }

encrypted_content: string

title: string

type: "web_search_result"

Accepts one of the following:

"web_search_result"

url: string

page_age: optional string

BetaWebSearchToolRequestError = object { error_code, type }

error_code: BetaWebSearchToolResultErrorCode

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"max_uses_exceeded"

"too_many_requests"

"query_too_long"

type: "web_search_tool_result_error"

Accepts one of the following:

"web_search_tool_result_error"

tool_use_id: string

type: "web_search_tool_result"

Accepts one of the following:

"web_search_tool_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaWebFetchToolResultBlockParam = object { content, tool_use_id, type, cache_control }

content: BetaWebFetchToolResultErrorBlockParam { error_code, type } or BetaWebFetchBlockParam { content, type, url, retrieved_at }

Accepts one of the following:

BetaWebFetchToolResultErrorBlockParam = object { error_code, type }

error_code: BetaWebFetchToolResultErrorCode

Accepts one of the following:

"invalid_tool_input"

"url_too_long"

"url_not_allowed"

"url_not_accessible"

"unsupported_content_type"

"too_many_requests"

"max_uses_exceeded"

"unavailable"

type: "web_fetch_tool_result_error"

Accepts one of the following:

"web_fetch_tool_result_error"

BetaWebFetchBlockParam = object { content, type, url, retrieved_at }

content: BetaRequestDocumentBlock { source, type, cache_control, 3 more }

source: BetaBase64PDFSource { data, media_type, type } or BetaPlainTextSource { data, media_type, type } or BetaContentBlockSource { content, type } or 2 more

Accepts one of the following:

BetaBase64PDFSource = object { data, media_type, type }

data: string

media_type: "application/pdf"

Accepts one of the following:

"application/pdf"

type: "base64"

Accepts one of the following:

"base64"

BetaPlainTextSource = object { data, media_type, type }

data: string

media_type: "text/plain"

Accepts one of the following:

"text/plain"

type: "text"

Accepts one of the following:

"text"

BetaContentBlockSource = object { content, type }

content: string or array of BetaContentBlockSourceContent

Accepts one of the following:

UnionMember0 = string

BetaContentBlockSourceContent = array of BetaContentBlockSourceContent

Accepts one of the following:

BetaTextBlockParam = object { text, type, cache_control, citations }

text: string

type: "text"

Accepts one of the following:

"text"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional array of BetaTextCitationParam

Accepts one of the following:

BetaCitationCharLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationWebSearchResultLocationParam = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocationParam = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

BetaImageBlockParam = object { source, type, cache_control }

source: BetaBase64ImageSource { data, media_type, type } or BetaURLImageSource { type, url } or BetaFileImageSource { file_id, type }

Accepts one of the following:

BetaBase64ImageSource = object { data, media_type, type }

data: string

media_type: "image/jpeg" or "image/png" or "image/gif" or "image/webp"

Accepts one of the following:

"image/jpeg"

"image/png"

"image/gif"

"image/webp"

type: "base64"

Accepts one of the following:

"base64"

BetaURLImageSource = object { type, url }

type: "url"

Accepts one of the following:

"url"

url: string

BetaFileImageSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

type: "image"

Accepts one of the following:

"image"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

type: "content"

Accepts one of the following:

"content"

BetaURLPDFSource = object { type, url }

type: "url"

Accepts one of the following:

"url"

url: string

BetaFileDocumentSource = object { file_id, type }

file_id: string

type: "file"

Accepts one of the following:

"file"

type: "document"

Accepts one of the following:

"document"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional BetaCitationsConfigParam { enabled }

enabled: optional boolean

context: optional string

title: optional string

type: "web_fetch_result"

Accepts one of the following:

"web_fetch_result"

url: string

Fetched content URL

retrieved_at: optional string

ISO 8601 timestamp when the content was retrieved

tool_use_id: string

type: "web_fetch_tool_result"

Accepts one of the following:

"web_fetch_tool_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaCodeExecutionToolResultBlockParam = object { content, tool_use_id, type, cache_control }

content: BetaCodeExecutionToolResultBlockParamContent

Accepts one of the following:

BetaCodeExecutionToolResultErrorParam = object { error_code, type }

error_code: BetaCodeExecutionToolResultErrorCode

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

type: "code_execution_tool_result_error"

Accepts one of the following:

"code_execution_tool_result_error"

BetaCodeExecutionResultBlockParam = object { content, return_code, stderr, 2 more }

content: array of BetaCodeExecutionOutputBlockParam { file_id, type }

file_id: string

type: "code_execution_output"

Accepts one of the following:

"code_execution_output"

return_code: number

stderr: string

stdout: string

type: "code_execution_result"

Accepts one of the following:

"code_execution_result"

tool_use_id: string

type: "code_execution_tool_result"

Accepts one of the following:

"code_execution_tool_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaBashCodeExecutionToolResultBlockParam = object { content, tool_use_id, type, cache_control }

content: BetaBashCodeExecutionToolResultErrorParam { error_code, type } or BetaBashCodeExecutionResultBlockParam { content, return_code, stderr, 2 more }

Accepts one of the following:

BetaBashCodeExecutionToolResultErrorParam = object { error_code, type }

error_code: "invalid_tool_input" or "unavailable" or "too_many_requests" or 2 more

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

"output_file_too_large"

type: "bash_code_execution_tool_result_error"

Accepts one of the following:

"bash_code_execution_tool_result_error"

BetaBashCodeExecutionResultBlockParam = object { content, return_code, stderr, 2 more }

content: array of BetaBashCodeExecutionOutputBlockParam { file_id, type }

file_id: string

type: "bash_code_execution_output"

Accepts one of the following:

"bash_code_execution_output"

return_code: number

stderr: string

stdout: string

type: "bash_code_execution_result"

Accepts one of the following:

"bash_code_execution_result"

tool_use_id: string

type: "bash_code_execution_tool_result"

Accepts one of the following:

"bash_code_execution_tool_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaTextEditorCodeExecutionToolResultBlockParam = object { content, tool_use_id, type, cache_control }

Accepts one of the following:

BetaTextEditorCodeExecutionToolResultErrorParam = object { error_code, type, error_message }

error_code: "invalid_tool_input" or "unavailable" or "too_many_requests" or 2 more

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

"file_not_found"

type: "text_editor_code_execution_tool_result_error"

Accepts one of the following:

"text_editor_code_execution_tool_result_error"

error_message: optional string

BetaTextEditorCodeExecutionViewResultBlockParam = object { content, file_type, type, 3 more }

content: string

file_type: "text" or "image" or "pdf"

Accepts one of the following:

"text"

"image"

"pdf"

type: "text_editor_code_execution_view_result"

Accepts one of the following:

"text_editor_code_execution_view_result"

num_lines: optional number

start_line: optional number

total_lines: optional number

BetaTextEditorCodeExecutionCreateResultBlockParam = object { is_file_update, type }

is_file_update: boolean

type: "text_editor_code_execution_create_result"

Accepts one of the following:

"text_editor_code_execution_create_result"

BetaTextEditorCodeExecutionStrReplaceResultBlockParam = object { type, lines, new_lines, 3 more }

type: "text_editor_code_execution_str_replace_result"

Accepts one of the following:

"text_editor_code_execution_str_replace_result"

lines: optional array of string

new_lines: optional number

new_start: optional number

old_lines: optional number

old_start: optional number

tool_use_id: string

type: "text_editor_code_execution_tool_result"

Accepts one of the following:

"text_editor_code_execution_tool_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaToolSearchToolResultBlockParam = object { content, tool_use_id, type, cache_control }

content: BetaToolSearchToolResultErrorParam { error_code, type } or BetaToolSearchToolSearchResultBlockParam { tool_references, type }

Accepts one of the following:

BetaToolSearchToolResultErrorParam = object { error_code, type }

error_code: "invalid_tool_input" or "unavailable" or "too_many_requests" or "execution_time_exceeded"

Accepts one of the following:

"invalid_tool_input"

"unavailable"

"too_many_requests"

"execution_time_exceeded"

type: "tool_search_tool_result_error"

Accepts one of the following:

"tool_search_tool_result_error"

BetaToolSearchToolSearchResultBlockParam = object { tool_references, type }

tool_references: array of BetaToolReferenceBlockParam { tool_name, type, cache_control }

tool_name: string

type: "tool_reference"

Accepts one of the following:

"tool_reference"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

type: "tool_search_tool_search_result"

Accepts one of the following:

"tool_search_tool_search_result"

tool_use_id: string

type: "tool_search_tool_result"

Accepts one of the following:

"tool_search_tool_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaMCPToolUseBlockParam = object { id, input, name, 3 more }

id: string

input: map[unknown]

server_name: string

The name of the MCP server

type: "mcp_tool_use"

Accepts one of the following:

"mcp_tool_use"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

BetaRequestMCPToolResultBlockParam = object { tool_use_id, type, cache_control, 2 more }

tool_use_id: string

type: "mcp_tool_result"

Accepts one of the following:

"mcp_tool_result"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

content: optional string or array of BetaTextBlockParam { text, type, cache_control, citations }

Accepts one of the following:

UnionMember0 = string

BetaMCPToolResultBlockParamContent = array of BetaTextBlockParam { text, type, cache_control, citations }

text: string

type: "text"

Accepts one of the following:

"text"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

citations: optional array of BetaTextCitationParam

Accepts one of the following:

BetaCitationCharLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_char_index: number

start_char_index: number

type: "char_location"

Accepts one of the following:

"char_location"

BetaCitationPageLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_page_number: number

start_page_number: number

type: "page_location"

Accepts one of the following:

"page_location"

BetaCitationContentBlockLocationParam = object { cited_text, document_index, document_title, 3 more }

cited_text: string

document_index: number

document_title: string

end_block_index: number

start_block_index: number

type: "content_block_location"

Accepts one of the following:

"content_block_location"

BetaCitationWebSearchResultLocationParam = object { cited_text, encrypted_index, title, 2 more }

cited_text: string

encrypted_index: string

title: string

type: "web_search_result_location"

Accepts one of the following:

"web_search_result_location"

url: string

BetaCitationSearchResultLocationParam = object { cited_text, end_block_index, search_result_index, 4 more }

cited_text: string

end_block_index: number

search_result_index: number

source: string

start_block_index: number

title: string

type: "search_result_location"

Accepts one of the following:

"search_result_location"

is_error: optional boolean

BetaContainerUploadBlockParam = object { file_id, type, cache_control }

A content block that represents a file to be uploaded to the container Files uploaded via this block will be available in the container's input directory.

file_id: string

type: "container_upload"

Accepts one of the following:

"container_upload"

cache_control: optional BetaCacheControlEphemeral { type, ttl }

Create a cache control breakpoint at this content block.

type: "ephemeral"

Accepts one of the following:

"ephemeral"

ttl: optional "5m" or "1h"

The time-to-live for the cache control breakpoint.

This may be one the following values:

5m: 5 minutes
1h: 1 hour

Defaults to 5m.

Accepts one of the following:

"5m"

"1h"

role: "user" or "assistant"

Accepts one of the following:

"user"

"assistant"

BetaMessageTokensCount = object { context_management, input_tokens }

context_management: BetaCountTokensContextManagementResponse { original_input_tokens }

Information about context management applied to the message.

original_input_tokens: number

The original token count before context management was applied

input_tokens: number

The total number of tokens across the provided list of messages, system prompt, and tools.

BetaMetadata = object { user_id }

user_id: optional string

An external identifier for the user who is associated with the request.

This should be a uuid, hash value, or other opaque identifier. Anthropic may use this id to help detect abuse. Do not include any identifying information such as name, email address, or phone number.

maxLength256

BetaOutputConfig = object { effort }

Beta

ModelsExpand Collapse

BetaModels

List Models

Get a Model

ModelsExpand Collapse

BetaMessages

Create a Message

Count tokens in a Message

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