--- title: List Models url: https://platform.claude.com/docs/en/api/models/list --- # List Models **GET** `/v1/models` List available models. The Models API response can be used to determine which models are available for use in the API. More recently released models are listed first. ## Query parameters - `after_id: optional string` ID of the object to use as a cursor for pagination. When provided, returns the page of results immediately after this object. - `before_id: optional string` ID of the object to use as a cursor for pagination. When provided, returns the page of results immediately before this object. - `limit: optional number` Number of items to return per page. Defaults to `20`. Ranges from `1` to `1000`. default: 20, minimum: 1, maximum: 1000 ## Headers - `"anthropic-workspace-id": optional string` Optional header to select the Workspace for this request. The value is a Workspace ID (for example, `wrkspc_011CZkZaBF1tNoB5wlCeusgy`). Only needed for credentials that can act on more than one Workspace. A credential that belongs to a specific Workspace may omit it; if sent, it must match that Workspace. - `"anthropic-beta": optional array of AnthropicBeta` **Deprecated**: Deprecated. This parameter will be removed from this method in a future release. To use beta features, call the beta models methods (`client.beta.models`) instead. Optional header to specify the beta version(s) you want to use. - `string` - `"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"` - `"fast-mode-2026-02-01"` - `"output-300k-2026-03-24"` - `"user-profiles-2026-03-24"` - `"user-profiles-2026-08-18"` - `"user-profiles-2026-09-04"` - `"advisor-tool-2026-03-01"` - `"managed-agents-2026-04-01"` - `"cache-diagnosis-2026-04-07"` - `"dreaming-2026-04-21"` - `"thinking-token-count-2026-05-13"` - `"server-side-fallback-2026-06-01"` - `"server-side-fallback-2026-07-01"` - `"fallback-credit-2026-06-01"` - `"fallback-credit-2026-07-01"` - `"agent-memory-2026-07-22"` - `"mid-conversation-tool-changes-2026-07-01"` - `"compact-2026-01-12"` - `"computer-use-2025-11-24"` - `"mcp-tunnels-2026-06-22"` - `"structured-outputs-2025-11-13"` - `"task-budgets-2026-03-13"` - `"thinking-display-updates-2026-08-18"` - `"ce-user-management-2026-07-13"` - `"mid-conversation-output-config-2026-07-01"` - `"thinking-binding-controls-2026-08-01"` - `"mid-conversation-system-clear-at-2026-08-21"` - `"compact-2026-09-04"` - `"inline-tools-2026-09-15"` - `"mcp-client-2026-09-15"` - `"ce-plugins-2026-09-01"` - `"spend-limit-reads-2026-09-26"` ## Returns - `data: array of ModelInfo` - `type: "model"` Object type. For Models, this is always `"model"`. default: model - `id: string` Unique model identifier. - `capabilities: ModelCapabilities or null` Object mapping capability names to their support details. Keys are always present for all known capabilities. - `batch: CapabilitySupport` Whether the model supports the Batch API. - `supported: boolean` Whether this capability is supported by the model. - `citations: CapabilitySupport` Whether the model supports citation generation. - `code_execution: CapabilitySupport` Whether the model supports code execution tools. - `context_management: ContextManagementCapability` Context management support and available strategies. - `clear_thinking_20251015: CapabilitySupport or null` Whether the clear_thinking_20251015 strategy is supported. - `clear_tool_uses_20250919: CapabilitySupport or null` Whether the clear_tool_uses_20250919 strategy is supported. - `compact_20260112: CapabilitySupport or null` Whether the compact_20260112 strategy is supported. - `supported: boolean` Whether this capability is supported by the model. - `effort: EffortCapability` Effort (reasoning_effort) support and available levels. - `high: CapabilitySupport` Whether the model supports high effort level. - `low: CapabilitySupport` Whether the model supports low effort level. - `max: CapabilitySupport` Whether the model supports max effort level. - `medium: CapabilitySupport` Whether the model supports medium effort level. - `supported: boolean` Whether this capability is supported by the model. - `xhigh: CapabilitySupport or null` Whether the model supports xhigh effort level. - `image_input: CapabilitySupport` Whether the model accepts image content blocks. - `pdf_input: CapabilitySupport` Whether the model accepts PDF content blocks. - `structured_outputs: CapabilitySupport` Whether the model supports structured output / JSON mode / strict tool schemas. - `thinking: ThinkingCapability` Thinking capability and supported type configurations. - `supported: boolean` Whether this capability is supported by the model. - `types: ThinkingTypes` Supported thinking type configurations. - `adaptive: CapabilitySupport` Whether the model supports thinking with type 'adaptive' (auto). - `enabled: CapabilitySupport` Whether the model supports thinking with type 'enabled'. - `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. format: date-time - `display_name: string` A human-readable name for the model. - `max_input_tokens: number or null` Maximum input context window size in tokens for this model. - `max_tokens: number or null` Maximum value for the `max_tokens` parameter when using this model. - `first_id: string or null` First ID in the `data` list. Can be used as the `before_id` for the previous page. - `has_more: boolean` Indicates if there are more results in the requested page direction. - `last_id: string or null` Last ID in the `data` list. Can be used as the `after_id` for the next page. ## Example ```bash curl https://api.anthropic.com/v1/models \ -H 'anthropic-version: 2023-06-01' \ -H "X-Api-Key: $ANTHROPIC_API_KEY" ``` ### Response (200) ```json { "data": [ { "id": "claude-opus-5", "capabilities": { "batch": { "supported": true }, "citations": { "supported": true }, "code_execution": { "supported": true }, "context_management": { "clear_thinking_20251015": { "supported": true }, "clear_tool_uses_20250919": { "supported": true }, "compact_20260112": { "supported": true }, "supported": true }, "effort": { "high": { "supported": true }, "low": { "supported": true }, "max": { "supported": true }, "medium": { "supported": true }, "supported": true, "xhigh": { "supported": true } }, "image_input": { "supported": true }, "pdf_input": { "supported": true }, "structured_outputs": { "supported": true }, "thinking": { "supported": true, "types": { "adaptive": { "supported": true }, "enabled": { "supported": true } } } }, "created_at": "2026-07-24T00:00:00Z", "display_name": "Claude Opus 5", "max_input_tokens": 0, "max_tokens": 0, "type": "model" } ], "first_id": "first_id", "has_more": true, "last_id": "last_id" } ```