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 ParametersExpand Collapse

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.

maximum1000

minimum1

Header ParametersExpand Collapse

"anthropic-beta": optional array of AnthropicBeta

Optional header to specify the beta version(s) you want to use.

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 17 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"

"fast-mode-2026-02-01"

ReturnsExpand Collapse

data: array of ModelInfo { id, capabilities, created_at, 4 more }

id: string

Unique model identifier.

capabilities: ModelCapabilities { batch, citations, code_execution, 6 more }

Model capability information.

batch: CapabilitySupport { supported }

Whether the model supports the Batch API.

supported: boolean

Whether this capability is supported by the model.

citations: CapabilitySupport { supported }

Whether the model supports citation generation.

supported: boolean

Whether this capability is supported by the model.

code_execution: CapabilitySupport { supported }

Whether the model supports code execution tools.

supported: boolean

Whether this capability is supported by the model.

context_management: ContextManagementCapability { clear_thinking_20251015, clear_tool_uses_20250919, compact_20260112, supported }

Context management support and available strategies.

clear_thinking_20251015: CapabilitySupport { supported }

Indicates whether a capability is supported.

supported: boolean

Whether this capability is supported by the model.

clear_tool_uses_20250919: CapabilitySupport { supported }

Indicates whether a capability is supported.

supported: boolean

Whether this capability is supported by the model.

compact_20260112: CapabilitySupport { supported }

Indicates whether a capability is supported.

supported: boolean

Whether this capability is supported by the model.

supported: boolean

Whether this capability is supported by the model.

effort: EffortCapability { high, low, max, 2 more }

Effort (reasoning_effort) support and available levels.

high: CapabilitySupport { supported }

Whether the model supports high effort level.

supported: boolean

Whether this capability is supported by the model.

low: CapabilitySupport { supported }

Whether the model supports low effort level.

supported: boolean

Whether this capability is supported by the model.

max: CapabilitySupport { supported }

Whether the model supports max effort level.

supported: boolean

Whether this capability is supported by the model.

medium: CapabilitySupport { supported }

Whether the model supports medium effort level.

supported: boolean

Whether this capability is supported by the model.

supported: boolean

Whether this capability is supported by the model.

image_input: CapabilitySupport { supported }

Whether the model accepts image content blocks.

supported: boolean

Whether this capability is supported by the model.

pdf_input: CapabilitySupport { supported }

Whether the model accepts PDF content blocks.

supported: boolean

Whether this capability is supported by the model.

structured_outputs: CapabilitySupport { supported }

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

supported: boolean

Whether this capability is supported by the model.

thinking: ThinkingCapability { supported, types }

Thinking capability and supported type configurations.

supported: boolean

Whether this capability is supported by the model.

types: ThinkingTypes { adaptive, enabled }

Supported thinking type configurations.

adaptive: CapabilitySupport { supported }

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

supported: boolean

Whether this capability is supported by the model.

enabled: CapabilitySupport { supported }

Whether the model supports thinking with type 'enabled'.

supported: boolean

Whether this capability is supported by the model.

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.

display_name: string

A human-readable name for the model.

max_input_tokens: number

Maximum input context window size in tokens for this model.

max_tokens: number

Maximum value for the max_tokens parameter when using this model.

type: "model"

Object type.

For Models, this is always "model".

first_id: string

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

Last ID in the data list. Can be used as the after_id for the next page.

List Models

curl https://api.anthropic.com/v1/models \
    -H 'anthropic-version: 2023-06-01' \
    -H "X-Api-Key: $ANTHROPIC_API_KEY"

Response 200

{
  "data": [
    {
      "id": "claude-opus-4-6",
      "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
        },
        "image_input": {
          "supported": true
        },
        "pdf_input": {
          "supported": true
        },
        "structured_outputs": {
          "supported": true
        },
        "thinking": {
          "supported": true,
          "types": {
            "adaptive": {
              "supported": true
            },
            "enabled": {
              "supported": true
            }
          }
        }
      },
      "created_at": "2026-02-04T00:00:00Z",
      "display_name": "Claude Opus 4.6",
      "max_input_tokens": 0,
      "max_tokens": 0,
      "type": "model"
    }
  ],
  "first_id": "first_id",
  "has_more": true,
  "last_id": "last_id"
}

Returns Examples

Response 200

{
  "data": [
    {
      "id": "claude-opus-4-6",
      "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
        },
        "image_input": {
          "supported": true
        },
        "pdf_input": {
          "supported": true
        },
        "structured_outputs": {
          "supported": true
        },
        "thinking": {
          "supported": true,
          "types": {
            "adaptive": {
              "supported": true
            },
            "enabled": {
              "supported": true
            }
          }
        }
      },
      "created_at": "2026-02-04T00:00:00Z",
      "display_name": "Claude Opus 4.6",
      "max_input_tokens": 0,
      "max_tokens": 0,
      "type": "model"
    }
  ],
  "first_id": "first_id",
  "has_more": true,
  "last_id": "last_id"
}