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[str]
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[str]
ID of the object to use as a cursor for pagination. When provided, returns the page of results immediately before this object.
Returns
List Models
import os
from anthropic import Anthropic
client = Anthropic(
api_key=os.environ.get("ANTHROPIC_API_KEY"), # This is the default and can be omitted
)
page = client.beta.models.list()
page = page.data[0]
print(page.id)Response 200
{
"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
},
"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"
}Returns Examples
Response 200
{
"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
},
"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"
}