Anthropic · Model retirement
claude-opus-4-1
Stopped working
Calls to the model claude-opus-4-1 on Anthropic stopped working on August 5, 2026.
What to use instead of claude-opus-4-1
Move to claude-opus-4-8, recommended by Anthropic.
Facts
- API
- Anthropic
api.anthropic.com - Model
claude-opus-4-1- Kind
- Model retirement
- Announced
- June 5, 2026
- Takes effect
- August 5, 2026
- Calls after that day
- Fail
- Source
- Deprecations page
- Last updated
claude-opus-4-1 on other APIs
- OpenCode Deprecated, no date
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