# Models ## List Models `$ ant models 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. ### Parameters - `--after-id: optional string` Query param: 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` Query param: 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` Query param: Number of items to return per page. Defaults to `20`. Ranges from `1` to `1000`. - `--beta: optional array of AnthropicBeta` Header param: Optional header to specify the beta version(s) you want to use. ### Returns - `ListResponse_ModelInfo_: object { data, first_id, has_more, last_id }` - `data: array of ModelInfo` - `id: string` Unique model identifier. - `capabilities: object { batch, citations, code_execution, 6 more }` Model capability information. - `batch: object { supported }` Whether the model supports the Batch API. - `supported: boolean` Whether this capability is supported by the model. - `citations: object { supported }` Whether the model supports citation generation. - `supported: boolean` Whether this capability is supported by the model. - `code_execution: object { supported }` Whether the model supports code execution tools. - `supported: boolean` Whether this capability is supported by the model. - `context_management: object { clear_thinking_20251015, clear_tool_uses_20250919, compact_20260112, supported }` Context management support and available strategies. - `clear_thinking_20251015: object { supported }` Indicates whether a capability is supported. - `supported: boolean` Whether this capability is supported by the model. - `clear_tool_uses_20250919: object { supported }` Indicates whether a capability is supported. - `supported: boolean` Whether this capability is supported by the model. - `compact_20260112: object { 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: object { high, low, max, 3 more }` Effort (reasoning_effort) support and available levels. - `high: object { supported }` Whether the model supports high effort level. - `supported: boolean` Whether this capability is supported by the model. - `low: object { supported }` Whether the model supports low effort level. - `supported: boolean` Whether this capability is supported by the model. - `max: object { supported }` Whether the model supports max effort level. - `supported: boolean` Whether this capability is supported by the model. - `medium: object { 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. - `xhigh: object { supported }` Indicates whether a capability is supported. - `supported: boolean` Whether this capability is supported by the model. - `image_input: object { supported }` Whether the model accepts image content blocks. - `supported: boolean` Whether this capability is supported by the model. - `pdf_input: object { supported }` Whether the model accepts PDF content blocks. - `supported: boolean` Whether this capability is supported by the model. - `structured_outputs: object { supported }` Whether the model supports structured output / JSON mode / strict tool schemas. - `supported: boolean` Whether this capability is supported by the model. - `thinking: object { supported, types }` Thinking capability and supported type configurations. - `supported: boolean` Whether this capability is supported by the model. - `types: object { adaptive, enabled }` Supported thinking type configurations. - `adaptive: object { supported }` Whether the model supports thinking with type 'adaptive' (auto). - `supported: boolean` Whether this capability is supported by the model. - `enabled: object { 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. ### Example ```cli ant models list \ --api-key my-anthropic-api-key ``` #### Response ```json { "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, "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": "2026-02-04T00:00:00Z", "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" } ``` ## Get a Model `$ ant models retrieve` **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. ### Parameters - `--model-id: string` Model identifier or alias. - `--beta: optional array of AnthropicBeta` Optional header to specify the beta version(s) you want to use. ### Returns - `model_info: object { id, capabilities, created_at, 4 more }` - `id: string` Unique model identifier. - `capabilities: object { batch, citations, code_execution, 6 more }` Model capability information. - `batch: object { supported }` Whether the model supports the Batch API. - `supported: boolean` Whether this capability is supported by the model. - `citations: object { supported }` Whether the model supports citation generation. - `supported: boolean` Whether this capability is supported by the model. - `code_execution: object { supported }` Whether the model supports code execution tools. - `supported: boolean` Whether this capability is supported by the model. - `context_management: object { clear_thinking_20251015, clear_tool_uses_20250919, compact_20260112, supported }` Context management support and available strategies. - `clear_thinking_20251015: object { supported }` Indicates whether a capability is supported. - `supported: boolean` Whether this capability is supported by the model. - `clear_tool_uses_20250919: object { supported }` Indicates whether a capability is supported. - `supported: boolean` Whether this capability is supported by the model. - `compact_20260112: object { 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: object { high, low, max, 3 more }` Effort (reasoning_effort) support and available levels. - `high: object { supported }` Whether the model supports high effort level. - `supported: boolean` Whether this capability is supported by the model. - `low: object { supported }` Whether the model supports low effort level. - `supported: boolean` Whether this capability is supported by the model. - `max: object { supported }` Whether the model supports max effort level. - `supported: boolean` Whether this capability is supported by the model. - `medium: object { 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. - `xhigh: object { supported }` Indicates whether a capability is supported. - `supported: boolean` Whether this capability is supported by the model. - `image_input: object { supported }` Whether the model accepts image content blocks. - `supported: boolean` Whether this capability is supported by the model. - `pdf_input: object { supported }` Whether the model accepts PDF content blocks. - `supported: boolean` Whether this capability is supported by the model. - `structured_outputs: object { supported }` Whether the model supports structured output / JSON mode / strict tool schemas. - `supported: boolean` Whether this capability is supported by the model. - `thinking: object { supported, types }` Thinking capability and supported type configurations. - `supported: boolean` Whether this capability is supported by the model. - `types: object { adaptive, enabled }` Supported thinking type configurations. - `adaptive: object { supported }` Whether the model supports thinking with type 'adaptive' (auto). - `supported: boolean` Whether this capability is supported by the model. - `enabled: object { 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"`. ### Example ```cli ant models retrieve \ --api-key my-anthropic-api-key \ --model-id model_id ``` #### Response ```json { "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, "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": "2026-02-04T00:00:00Z", "display_name": "Claude Opus 4.6", "max_input_tokens": 0, "max_tokens": 0, "type": "model" } ``` ## Domain Types ### Capability Support - `capability_support: object { supported }` Indicates whether a capability is supported. - `supported: boolean` Whether this capability is supported by the model. ### Context Management Capability - `context_management_capability: object { clear_thinking_20251015, clear_tool_uses_20250919, compact_20260112, supported }` Context management capability details. - `clear_thinking_20251015: object { supported }` Indicates whether a capability is supported. - `supported: boolean` Whether this capability is supported by the model. - `clear_tool_uses_20250919: object { supported }` Indicates whether a capability is supported. - `supported: boolean` Whether this capability is supported by the model. - `compact_20260112: object { 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 Capability - `effort_capability: object { high, low, max, 3 more }` Effort (reasoning_effort) capability details. - `high: object { supported }` Whether the model supports high effort level. - `supported: boolean` Whether this capability is supported by the model. - `low: object { supported }` Whether the model supports low effort level. - `supported: boolean` Whether this capability is supported by the model. - `max: object { supported }` Whether the model supports max effort level. - `supported: boolean` Whether this capability is supported by the model. - `medium: object { 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. - `xhigh: object { supported }` Indicates whether a capability is supported. - `supported: boolean` Whether this capability is supported by the model. ### Model Capabilities - `model_capabilities: object { batch, citations, code_execution, 6 more }` Model capability information. - `batch: object { supported }` Whether the model supports the Batch API. - `supported: boolean` Whether this capability is supported by the model. - `citations: object { supported }` Whether the model supports citation generation. - `supported: boolean` Whether this capability is supported by the model. - `code_execution: object { supported }` Whether the model supports code execution tools. - `supported: boolean` Whether this capability is supported by the model. - `context_management: object { clear_thinking_20251015, clear_tool_uses_20250919, compact_20260112, supported }` Context management support and available strategies. - `clear_thinking_20251015: object { supported }` Indicates whether a capability is supported. - `supported: boolean` Whether this capability is supported by the model. - `clear_tool_uses_20250919: object { supported }` Indicates whether a capability is supported. - `supported: boolean` Whether this capability is supported by the model. - `compact_20260112: object { 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: object { high, low, max, 3 more }` Effort (reasoning_effort) support and available levels. - `high: object { supported }` Whether the model supports high effort level. - `supported: boolean` Whether this capability is supported by the model. - `low: object { supported }` Whether the model supports low effort level. - `supported: boolean` Whether this capability is supported by the model. - `max: object { supported }` Whether the model supports max effort level. - `supported: boolean` Whether this capability is supported by the model. - `medium: object { 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. - `xhigh: object { supported }` Indicates whether a capability is supported. - `supported: boolean` Whether this capability is supported by the model. - `image_input: object { supported }` Whether the model accepts image content blocks. - `supported: boolean` Whether this capability is supported by the model. - `pdf_input: object { supported }` Whether the model accepts PDF content blocks. - `supported: boolean` Whether this capability is supported by the model. - `structured_outputs: object { supported }` Whether the model supports structured output / JSON mode / strict tool schemas. - `supported: boolean` Whether this capability is supported by the model. - `thinking: object { supported, types }` Thinking capability and supported type configurations. - `supported: boolean` Whether this capability is supported by the model. - `types: object { adaptive, enabled }` Supported thinking type configurations. - `adaptive: object { supported }` Whether the model supports thinking with type 'adaptive' (auto). - `supported: boolean` Whether this capability is supported by the model. - `enabled: object { supported }` Whether the model supports thinking with type 'enabled'. - `supported: boolean` Whether this capability is supported by the model. ### Model Info - `model_info: object { id, capabilities, created_at, 4 more }` - `id: string` Unique model identifier. - `capabilities: object { batch, citations, code_execution, 6 more }` Model capability information. - `batch: object { supported }` Whether the model supports the Batch API. - `supported: boolean` Whether this capability is supported by the model. - `citations: object { supported }` Whether the model supports citation generation. - `supported: boolean` Whether this capability is supported by the model. - `code_execution: object { supported }` Whether the model supports code execution tools. - `supported: boolean` Whether this capability is supported by the model. - `context_management: object { clear_thinking_20251015, clear_tool_uses_20250919, compact_20260112, supported }` Context management support and available strategies. - `clear_thinking_20251015: object { supported }` Indicates whether a capability is supported. - `supported: boolean` Whether this capability is supported by the model. - `clear_tool_uses_20250919: object { supported }` Indicates whether a capability is supported. - `supported: boolean` Whether this capability is supported by the model. - `compact_20260112: object { 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: object { high, low, max, 3 more }` Effort (reasoning_effort) support and available levels. - `high: object { supported }` Whether the model supports high effort level. - `supported: boolean` Whether this capability is supported by the model. - `low: object { supported }` Whether the model supports low effort level. - `supported: boolean` Whether this capability is supported by the model. - `max: object { supported }` Whether the model supports max effort level. - `supported: boolean` Whether this capability is supported by the model. - `medium: object { 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. - `xhigh: object { supported }` Indicates whether a capability is supported. - `supported: boolean` Whether this capability is supported by the model. - `image_input: object { supported }` Whether the model accepts image content blocks. - `supported: boolean` Whether this capability is supported by the model. - `pdf_input: object { supported }` Whether the model accepts PDF content blocks. - `supported: boolean` Whether this capability is supported by the model. - `structured_outputs: object { supported }` Whether the model supports structured output / JSON mode / strict tool schemas. - `supported: boolean` Whether this capability is supported by the model. - `thinking: object { supported, types }` Thinking capability and supported type configurations. - `supported: boolean` Whether this capability is supported by the model. - `types: object { adaptive, enabled }` Supported thinking type configurations. - `adaptive: object { supported }` Whether the model supports thinking with type 'adaptive' (auto). - `supported: boolean` Whether this capability is supported by the model. - `enabled: object { 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"`. ### Thinking Capability - `thinking_capability: object { supported, types }` Thinking capability details. - `supported: boolean` Whether this capability is supported by the model. - `types: object { adaptive, enabled }` Supported thinking type configurations. - `adaptive: object { supported }` Whether the model supports thinking with type 'adaptive' (auto). - `supported: boolean` Whether this capability is supported by the model. - `enabled: object { supported }` Whether the model supports thinking with type 'enabled'. - `supported: boolean` Whether this capability is supported by the model. ### Thinking Types - `thinking_types: object { adaptive, enabled }` Supported thinking type configurations. - `adaptive: object { supported }` Whether the model supports thinking with type 'adaptive' (auto). - `supported: boolean` Whether this capability is supported by the model. - `enabled: object { supported }` Whether the model supports thinking with type 'enabled'. - `supported: boolean` Whether this capability is supported by the model.