Claude Platform Docs

Models

List Models
$client->beta->models->list(?string afterID, ?string beforeID, ?int limit, ?list<AnthropicBeta> betas, ?string workspaceID): Page<BetaModelInfo>
GET/v1/models

List available models.

Get a Model
$client->beta->models->retrieve(string modelID, ?list<AnthropicBeta> betas, ?string workspaceID): BetaModelInfo
GET/v1/models/{model_id}

Get a specific model.

Models
class BetaCapabilitySupport { $supported; }
bool supported

Whether this capability is supported by the model.

class BetaCompactionCapability { $summarize; $supported; }
BetaCapabilitySupport summarize

Whether the summarize compaction type is supported.

bool supported

Whether this capability is supported by the model.

class BetaContextManagementCapability { $clearThinking20251015; $clearToolUses20250919; $compact20260112; $supported; }
?BetaCapabilitySupport clearThinking20251015

Whether the clear_thinking_20251015 strategy is supported.

?BetaCapabilitySupport clearToolUses20250919

Whether the clear_tool_uses_20250919 strategy is supported.

?BetaCapabilitySupport compact20260112

Whether the compact_20260112 strategy is supported.

bool supported

Whether this capability is supported by the model.

class BetaEffortCapability { $high; $low; $max; /* 3 more */ }
BetaCapabilitySupport high

Whether the model supports high effort level.

BetaCapabilitySupport low

Whether the model supports low effort level.

BetaCapabilitySupport max

Whether the model supports max effort level.

BetaCapabilitySupport medium

Whether the model supports medium effort level.

bool supported

Whether this capability is supported by the model.

?BetaCapabilitySupport xhigh

Whether the model supports xhigh effort level.

class BetaModelCapabilities { $batch; $citations; $codeExecution; /* 7 more */ }
BetaCapabilitySupport batch

Whether the model supports the Batch API.

BetaCapabilitySupport citations

Whether the model supports citation generation.

BetaCapabilitySupport codeExecution

Whether the model supports code execution tools.

?BetaCompactionCapability compaction

Server-side compaction support (the top-level compaction parameter) and the accepted compaction.type values.

BetaContextManagementCapability contextManagement

Context management support and available strategies.

BetaEffortCapability effort

Effort (reasoning_effort) support and available levels.

BetaCapabilitySupport imageInput

Whether the model accepts image content blocks.

BetaCapabilitySupport pdfInput

Whether the model accepts PDF content blocks.

BetaCapabilitySupport structuredOutputs

Whether the model supports structured output / JSON mode / strict tool schemas.

BetaThinkingCapability thinking

Thinking capability and supported type configurations.

class BetaModelInfo { $type = 'model'; $id; $allowedFallbackModels; /* 6 more */ }
"model" type

Object type.

For Models, this is always "model".

string id

Unique model identifier.

?list<string> allowedFallbackModels

Model IDs this model accepts as fallbacks[i].model on the Messages API. An empty list means the fallbacks parameter is not supported for this model as primary.

?BetaModelCapabilities capabilities

Object mapping capability names to their support details. Keys are always present for all known capabilities.

\Datetime createdAt

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.

string displayName

A human-readable name for the model.

?BetaModelLine line

The model line this model belongs to, such as opus for both Claude Opus 4.5 and Claude Opus 4.6. More lines may be added. null when the model belongs to no line; do not infer a line from the id.

?int maxInputTokens

Maximum input context window size in tokens for this model.

?int maxTokens

Maximum value for the max_tokens parameter when using this model.

enum BetaModelLine
One of the following:
"haiku"
"sonnet"
"opus"
"fable"
"mythos"
class BetaThinkingCapability { $supported; $types; }
bool supported

Whether this capability is supported by the model.

BetaThinkingTypes types

Supported thinking type configurations.

class BetaThinkingTypes { $adaptive; $enabled; }
BetaCapabilitySupport adaptive

Whether the model supports thinking with type 'adaptive' (auto).

BetaCapabilitySupport enabled

Whether the model supports thinking with type 'enabled'.