AI: Claude Sonnet 4.5 and Claude Haiku 4.5 are not available in agent threads when using an Anthropic API key #40910
Description
In Agent threads, when using Anthropic as a provider, Claude Sonnet 4.5 and Claude Haiku 4.5 are not available.
Description
Steps to trigger the problem:
- Add Anthropic as a provider in the LLM Providers settings.
- Start a new thread.
Expected Behavior: All models that I have access to should be available.
Actual Behavior: Claude Haiku 4.5 and Claude Sonnet 4.5 are not available.
Model Provider Details
- Provider: Anthropic via API key
- Model Name: Claude Haiku 4.5, Claude Sonnet 4.5,
- Mode: Agent Panel
- Other Details (MCPs, other settings, etc):
More Details
- I tried quitting and restarting Zed.
- I tried removing and re-adding the API key to Zed.
Using the exact same API key that I added to Zed, I verified that Claude 4.5 models are available to me:
$ export ANTHROPIC_API_KEY="<redacted>"
$ curl https://api.anthropic.com/v1/models \
--header "x-api-key: $ANTHROPIC_API_KEY" \
--header "anthropic-version: 2023-06-01" | jq
{
"data": [
{
"type": "model",
"id": "claude-haiku-4-5-20251001",
"display_name": "Claude Haiku 4.5",
"created_at": "2025-10-15T00:00:00Z"
},
{
"type": "model",
"id": "claude-sonnet-4-5-20250929",
"display_name": "Claude Sonnet 4.5",
"created_at": "2025-09-29T00:00:00Z"
},
{
"type": "model",
"id": "claude-opus-4-1-20250805",
"display_name": "Claude Opus 4.1",
"created_at": "2025-08-05T00:00:00Z"
},
{
"type": "model",
"id": "claude-opus-4-20250514",
"display_name": "Claude Opus 4",
"created_at": "2025-05-22T00:00:00Z"
},
{
"type": "model",
"id": "claude-sonnet-4-20250514",
"display_name": "Claude Sonnet 4",
"created_at": "2025-05-22T00:00:00Z"
},
{
"type": "model",
"id": "claude-3-7-sonnet-20250219",
"display_name": "Claude Sonnet 3.7",
"created_at": "2025-02-24T00:00:00Z"
},
{
"type": "model",
"id": "claude-3-5-sonnet-20241022",
"display_name": "Claude Sonnet 3.5 (New)",
"created_at": "2024-10-22T00:00:00Z"
},
{
"type": "model",
"id": "claude-3-5-haiku-20241022",
"display_name": "Claude Haiku 3.5",
"created_at": "2024-10-22T00:00:00Z"
},
{
"type": "model",
"id": "claude-3-5-sonnet-20240620",
"display_name": "Claude Sonnet 3.5 (Old)",
"created_at": "2024-06-20T00:00:00Z"
},
{
"type": "model",
"id": "claude-3-haiku-20240307",
"display_name": "Claude Haiku 3",
"created_at": "2024-03-07T00:00:00Z"
},
{
"type": "model",
"id": "claude-3-opus-20240229",
"display_name": "Claude Opus 3",
"created_at": "2024-02-29T00:00:00Z"
}
],
"has_more": false,
"first_id": "claude-haiku-4-5-20251001",
"last_id": "claude-3-opus-20240229"
}It is not listed in Zed:
