Anthropic
claude-opus-4 model retirement
Stopped workingSubscribe to AnthropicShare
Anthropic retired model claude-opus-4 on June 15, 2026, following its deprecation on April 14, 2026. Calls specifying this model fail since that date. Requests made to this model are no longer served.
The error you get
What Anthropic answers a call to claude-opus-4 once the model is gone, as recorded from real responses:
{"type":"error","error":{"type":"not_found_error","message":"model: claude-opus-4"}}What to use instead of claude-opus-4
Move to claude-opus-4-8, which Anthropic recommends as the replacement.
In Anthropic's words
API model name: claude-opus-4-20250514; Current state: Retired; Deprecated: April 14, 2026; Tentative retirement date: June 15, 2026
Facts
- API
- Anthropic
api.anthropic.com - Model
claude-opus-4- 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-opus-4 shut down?
Calls to the model claude-opus-4 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-opus-4 return once it is shut down?
Anthropic answers HTTP 404: "model: claude-opus-4". Send another model to fix it.
When was claude-opus-4 released?
claude-opus-4 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.