---
title: List Models
url: https://platform.claude.com/docs/en/api/php/models/list
---

# List Models

`$client->models->list(?string afterID, ?string beforeID, ?list<Lifecycle> lifecycle, ?int limit, ?string workspaceID): Page<ModelInfo>`

**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

- `afterID?: optional string` (query parameter)

  ID of the object to use as a cursor for pagination. When provided, returns the page of results immediately after this object.

- `beforeID?: optional string` (query parameter)

  ID of the object to use as a cursor for pagination. When provided, returns the page of results immediately before this object.

- `lifecycle?: optional list<Lifecycle>` (query parameter)

  Filter the list to models in any of the given lifecycle stages (`active`, `deprecated`, or `retired`). Up to 3 values. When omitted, the list contains the `active` and `deprecated` models; `retired` models appear only when `retired` is requested explicitly.

- `limit?: optional int` (query parameter)

  Number of items to return per page.

  Defaults to `20`. Ranges from `1` to `1000`.

  default: 20

- `workspaceID?: optional string` (header parameter)

  Optional header to select the Workspace for this request. The value is a Workspace ID (for example, `wrkspc_011CZkZaBF1tNoB5wlCeusgy`).

  Only needed for credentials that can act on more than one Workspace. A credential that belongs to a specific Workspace may omit it; if sent, it must match that Workspace.

## Returns

- `class ModelInfo`

  - `"model" type`

    Object type.

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

  - `string id`

    Unique model identifier.

  - `?ModelCapabilities capabilities`

    Object mapping capability names to their support details. Keys are always present for all known capabilities.

  - `\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.

  - `?\Datetime deprecatedAt`

    RFC 3339 datetime string representing the time of the model's most recent deprecation. Populated for `deprecated` and `retired` models; `null` while the model is `active`.

  - `string displayName`

    A human-readable name for the model.

  - `Lifecycle lifecycle`

    The model's current lifecycle stage.

    - `active`: The model is available for use, open to new adopters, and not scheduled for retirement.
    - `deprecated`: The model remains callable for organizations with existing access, but is headed for retirement and closed to new adopters.
    - `retired`: The model is no longer available for use; inference requests naming it fail. It remains in the catalogue as the historical record of its retirement.

  - `?ModelLine line`

    The model line this model belongs to, such as `opus` for both Claude Opus 4.5 and Claude Opus 4.6. More lines may be added. `null` when the model belongs to no line; do not infer a line from the `id`.

  - `?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.

  - `?\Datetime retiresAt`

    RFC 3339 datetime string representing the model's currently scheduled retirement date. The schedule can be revised until retirement occurs; `null` while the model is `active` or while no retirement is scheduled. A past date on a `deprecated` model means retirement is overdue, not that it has occurred: `lifecycle` is the retirement signal.

## Example

```php
<?php

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

use Anthropic\Client;

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

$page = $client->models->list(
  afterID: 'after_id',
  beforeID: 'before_id',
  lifecycle: ['active'],
  limit: 1,
  workspaceID: 'wrkspc_011CZkZaBF1tNoB5wlCeusgy',
);

var_dump($page);
```

### Response (200)

```json
{
  "data": [
    {
      "id": "claude-opus-5-5",
      "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
        },
        "server_tools": {
          "code_execution": {
            "supported": true
          },
          "supported": true,
          "web_search": {
            "supported": true
          }
        },
        "structured_outputs": {
          "supported": true
        },
        "thinking": {
          "supported": true,
          "types": {
            "adaptive": {
              "supported": true
            },
            "between_tools": {
              "supported": true
            },
            "disabled": {
              "supported": true
            },
            "enabled": {
              "supported": true
            }
          }
        }
      },
      "created_at": "2026-09-21T00:00:00Z",
      "deprecated_at": "2019-12-27T18:11:19.117Z",
      "display_name": "Claude Opus 5.5",
      "lifecycle": "active",
      "line": "opus",
      "max_input_tokens": 0,
      "max_tokens": 0,
      "retires_at": "2019-12-27T18:11:19.117Z",
      "type": "model"
    }
  ],
  "first_id": "first_id",
  "has_more": true,
  "last_id": "last_id"
}
```