Anthropic (Claude API) · model
claude-opus-4-1-20250805 deprecation: shutdown date & replacement
Shut down August 5, 2026
- Provider
- Anthropic (Claude API)
- Name
- Claude Opus 4.1
- Type
- model
- Announced
- Shutdown
- Replacement
claude-opus-4-8- Source
- Official Anthropic (Claude API) notice
How to migrate off claude-opus-4-1-20250805
- Find every place that references it:
grep -rn --exclude-dir={node_modules,.git,dist} "claude-opus-4-1-20250805" . - Replace the model ID:
- model: "claude-opus-4-1-20250805" + model: "claude-opus-4-8" - Re-run your evals or a sample of real prompts — output style, token usage and pricing can change between models.
- Check config outside code too: environment variables, feature flags, prompt-management tools, and fine-tuned model references.
- Deploy before August 5, 2026, and add the CI scanner so it cannot come back.
Questions
Is claude-opus-4-1-20250805 deprecated?
Yes. Anthropic (Claude API) has deprecated claude-opus-4-1-20250805. It was shut down on August 5, 2026.
When does claude-opus-4-1-20250805 shut down?
August 5, 2026, according to Anthropic (Claude API)'s official deprecation notice.
What should I use instead of claude-opus-4-1-20250805?
Anthropic (Claude API) recommends claude-opus-4-8. Switch the model ID and re-test your prompts, since outputs, pricing and limits can differ.
What happens to requests to claude-opus-4-1-20250805 after the shutdown?
Requests using the retired model ID fail with an error, so any code still calling it breaks. Update and deploy before the shutdown date.