## Get a Model

`$client->beta->models->retrieve(string modelID, ?list<AnthropicBeta> betas): BetaModelInfo`

**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

- `modelID: string`

  Model identifier or alias.

- `betas?:optional list<AnthropicBeta>`

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

### Returns

- `BetaModelInfo`

  - `string id`

    Unique model identifier.

  - `?list<string> allowedFallbackModels`

    Model IDs this model accepts as `fallbacks[i].model` on the Messages API. An empty list means the `fallbacks` parameter is not supported for this model as primary.

  - `?BetaModelCapabilities capabilities`

    Model capability information.

  - `\Datetime createdAt`

    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.

  - `string displayName`

    A human-readable name for the model.

  - `?int maxInputTokens`

    Maximum input context window size in tokens for this model.

  - `?int maxTokens`

    Maximum value for the `max_tokens` parameter when using this model.

  - `"model" type`

    Object type.

    For Models, this is always `"model"`.

### Example

```php
<?php

require_once dirname(__DIR__) . '/vendor/autoload.php';

$client = new Client(apiKey: 'my-anthropic-api-key');

$betaModelInfo = $client->beta->models->retrieve(
  'model_id', betas: ['message-batches-2024-09-24']
);

var_dump($betaModelInfo);
```

#### Response

```json
{
  "id": "claude-opus-4-6",
  "allowed_fallback_models": [
    "string"
  ],
  "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"
}
```
