List 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.

get/v1/models?beta=true

Query parameters

before_idstring

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

after_idstring

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

limitinteger

Number of items to return per page.

Defaults to 20. Ranges from 1 to 1000.

Number of items to return per page.

Defaults to 20. Ranges from 1 to 1000.

Headers

anthropic-versionstring

The version of the Claude API you want to use.

Read more about versioning and our version history here.

The version of the Claude API you want to use.

Read more about versioning and our version history here.

anthropic-betastring

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

To use multiple betas, use a comma separated list like beta1,beta2 or specify the header multiple times for each beta.

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

To use multiple betas, use a comma separated list like beta1,beta2 or specify the header multiple times for each beta.

x-api-keystring

Your unique API key for authentication.

This key is required in the header of all API requests, to authenticate your account and access Anthropic's services. Get your API key through the Console. Each key is scoped to a Workspace.

Your unique API key for authentication.

This key is required in the header of all API requests, to authenticate your account and access Anthropic's services. Get your API key through the Console. Each key is scoped to a Workspace.

Response

Successful Response

first_idstring nullable required

First ID in the data list. Can be used as the before_id for the previous page.

has_moreboolean required

Indicates if there are more results in the requested page direction.

last_idstring nullable required

Last ID in the data list. Can be used as the after_id for the next page.

Example response

{
  "data": [
    {
      "created_at": "2026-07-24T00:00:00Z",
      "display_name": "Claude Opus 5",
      "id": "claude-opus-5"
    }
  ]
}

Changes

Changed in 3 of the 67 revisions of this API.5

Jun 9, 202600259327305f1See the full diff
- ○
  added the required property data/items/allowed_fallback_models to the response with the 200 status
  response-required-property-added
Apr 16, 2026e0696f59ae071See the full diff
- ○
  added the required property data/items/capabilities/anyOf[subschema #1: ModelCapabilities]/effort/xhigh to the response with the 200 status
  response-required-property-added
Mar 18, 2026dd2dcd00a7573See the full diff
- ○
  added the required property data/items/capabilities to the response with the 200 status
  response-required-property-added
- ○
  added the required property data/items/max_input_tokens to the response with the 200 status
  response-required-property-added
- ○
  added the required property data/items/max_tokens to the response with the 200 status
  response-required-property-added

Full history