Get a Model

beta.models.retrieve(model_id, **kwargs) -> BetaModelInfo { id, capabilities, created_at, 4 more }

GET/v1/models/{model_id}

Get a specific model.

The Models API response can be used to determine information about a specific model or resolve a model alias to a model ID.

ParametersExpand Collapse

model_id: String

Model identifier or alias.

betas: Array[AnthropicBeta]

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

Accepts one of the following:

String

:"message-batches-2024-09-24" | :"prompt-caching-2024-07-31" | :"computer-use-2024-10-22" | 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

class BetaModelInfo { id, capabilities, created_at, 4 more }

id: String

Unique model identifier.

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

Model capability information.

batch: BetaCapabilitySupport { supported }

Whether the model supports the Batch API.

supported: bool

Whether this capability is supported by the model.

citations: BetaCapabilitySupport { supported }

Whether the model supports citation generation.

supported: bool

Whether this capability is supported by the model.

code_execution: BetaCapabilitySupport { supported }

Whether the model supports code execution tools.

supported: bool

Whether this capability is supported by the model.

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

Context management support and available strategies.

clear_thinking_20251015: BetaCapabilitySupport { supported }

Indicates whether a capability is supported.

supported: bool

Whether this capability is supported by the model.

clear_tool_uses_20250919: BetaCapabilitySupport { supported }

Indicates whether a capability is supported.

supported: bool

Whether this capability is supported by the model.

compact_20260112: BetaCapabilitySupport { supported }

Indicates whether a capability is supported.

supported: bool

Whether this capability is supported by the model.

supported: bool

Whether this capability is supported by the model.

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

Effort (reasoning_effort) support and available levels.

high: BetaCapabilitySupport { supported }

Whether the model supports high effort level.

supported: bool

Whether this capability is supported by the model.

low: BetaCapabilitySupport { supported }

Whether the model supports low effort level.

supported: bool

Whether this capability is supported by the model.

max: BetaCapabilitySupport { supported }

Whether the model supports max effort level.

supported: bool

Whether this capability is supported by the model.

medium: BetaCapabilitySupport { supported }

Whether the model supports medium effort level.

supported: bool

Whether this capability is supported by the model.

supported: bool

Whether this capability is supported by the model.

image_input: BetaCapabilitySupport { supported }

Whether the model accepts image content blocks.

supported: bool

Whether this capability is supported by the model.

pdf_input: BetaCapabilitySupport { supported }

Whether the model accepts PDF content blocks.

supported: bool

Whether this capability is supported by the model.

structured_outputs: BetaCapabilitySupport { supported }

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

supported: bool

Whether this capability is supported by the model.

thinking: BetaThinkingCapability { supported, types }

Thinking capability and supported type configurations.

supported: bool

Whether this capability is supported by the model.

types: BetaThinkingTypes { adaptive, enabled }

Supported thinking type configurations.

adaptive: BetaCapabilitySupport { supported }

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

supported: bool

Whether this capability is supported by the model.

enabled: BetaCapabilitySupport { supported }

Whether the model supports thinking with type 'enabled'.

supported: bool

Whether this capability is supported by the model.

created_at: Time

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: Integer

Maximum input context window size in tokens for this model.

max_tokens: Integer

Maximum value for the max_tokens parameter when using this model.

type: :model

Object type.

For Models, this is always "model".

Get a Model

require "anthropic"

anthropic = Anthropic::Client.new(api_key: "my-anthropic-api-key")

beta_model_info = anthropic.beta.models.retrieve("model_id")

puts(beta_model_info)

Response 200

{
  "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"
}

Returns Examples

Response 200

{
  "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"
}