nex/docs/api_reference/anthropic/models.md

List

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.

Header Parameters

• "anthropic-beta": optional array of AnthropicBeta

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

  • UnionMember0 = string

  • UnionMember1 = "message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 20 more

    • "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"

    • "advisor-tool-2026-03-01"

    • "user-profiles-2026-03-24"

Returns

• data: array of ModelInfo

  • id: string

    Unique model identifier.

  • capabilities: ModelCapabilities

    Model capability information.

    • 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.

      • supported: boolean

        Whether this capability is supported by the model.

    • code_execution: CapabilitySupport

      Whether the model supports code execution tools.

      • supported: boolean

        Whether this capability is supported by the model.

    • context_management: ContextManagementCapability

      Context management support and available strategies.

      • clear_thinking_20251015: CapabilitySupport

        Indicates whether a capability is supported.

        • supported: boolean

          Whether this capability is supported by the model.

      • clear_tool_uses_20250919: CapabilitySupport

        Indicates whether a capability is supported.

        • supported: boolean

          Whether this capability is supported by the model.

      • compact_20260112: CapabilitySupport

        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

      Effort (reasoning_effort) support and available levels.

      • high: CapabilitySupport

        Whether the model supports high effort level.

        • supported: boolean

          Whether this capability is supported by the model.

      • low: CapabilitySupport

        Whether the model supports low effort level.

        • supported: boolean

          Whether this capability is supported by the model.

      • max: CapabilitySupport

        Whether the model supports max effort level.

        • supported: boolean

          Whether this capability is supported by the model.

      • medium: CapabilitySupport

        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.

      • xhigh: CapabilitySupport

        Indicates whether a capability is supported.

        • supported: boolean

          Whether this capability is supported by the model.

    • image_input: CapabilitySupport

      Whether the model accepts image content blocks.

      • supported: boolean

        Whether this capability is supported by the model.

    • pdf_input: CapabilitySupport

      Whether the model accepts PDF content blocks.

      • supported: boolean

        Whether this capability is supported by the model.

    • structured_outputs: CapabilitySupport

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

      • supported: boolean

        Whether this capability is supported by the model.

    • 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).

          • supported: boolean

            Whether this capability is supported by the model.

        • enabled: CapabilitySupport

          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".

    • "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.

Example

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