Anthropic
claude-sonnet-4-20250514 model retirement
Stopped workingSubscribe to AnthropicShare
Calls to model claude-sonnet-4-20250514 fail since June 15, 2026. The model was deprecated on April 14, 2026, and is now retired. Any requests specifying this model ID no longer succeed.
The error you get
What Anthropic answers a call to claude-sonnet-4-20250514 once the model is gone, as recorded from real responses:
{"type":"error","error":{"type":"not_found_error","message":"model: claude-sonnet-4-20250514"}}What to use instead of claude-sonnet-4-20250514
Move to claude-sonnet-5-5, which is recommended by Anthropic.
In Anthropic's words
API model name: claude-sonnet-4-20250514; Current state: Retired; Deprecated: April 14, 2026; Tentative retirement date: June 15, 2026
Facts
- API
- Anthropic
api.anthropic.com - Model
claude-sonnet-4-20250514- Released
- May 22, 2025 (models.dev)
- Kind
- Model retirement
- Announced
- April 14, 2026
- Takes effect
- June 15, 2026
- Calls after that day
- Fail
- Source
- Deprecations page
- Last updated
- Verified
- , against Anthropic's own pages
Questions
When does claude-sonnet-4-20250514 shut down?
Calls to the model claude-sonnet-4-20250514 on Anthropic stopped working on June 15, 2026.
What happens to calls after June 15, 2026?
They have failed since June 15, 2026.
What error does claude-sonnet-4-20250514 return once it is shut down?
Anthropic answers HTTP 404: "model: claude-sonnet-4-20250514". Send another model to fix it.
When was claude-sonnet-4-20250514 released?
claude-sonnet-4-20250514 was released on May 22, 2025, according to models.dev.
How do I find the calls this hits in my code?
Okapi reads your repository, finds the calls this change hits and opens a pull request with the fix. It never commits to your branches: every change comes as a pull request you review.
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You fixed this one by hand.
Okapi opens the pull request with the fix before the next breaking change reaches your code.