The next move
Audit direct Claude API usage and review sampling parameters before adopting the recommended replacement.
What the vendor says
Anthropic lists claude-opus-4-1-20250805 as retired on August 5, 2026 and recommends claude-opus-4-8. Its documentation also says nondefault temperature, top_p and top_k are rejected on Claude 4.7 and later; Python SDK v1.0+ removes those parameters.
Why it matters
Changing the model ID alone can leave incompatible request arguments. Check your SDK as well as the request body.
AI-Buzz suggested checks
Turn the notice into a task.
- Check request configuration and usage records for the retired ID. Keep Bedrock and Google Cloud deployments separate.
- Find temperature, top_p and top_k in request builders. Follow Anthropic’s guidance to omit those controls and express requirements in the prompt.
- Test representative workloads, error handling and output requirements against the recommended replacement before rolling it out.
What this does not establish
Retired is Anthropic’s reported status, not an AI-Buzz execution result. Partner-operated platforms have separate schedules. A vendor recommendation does not establish drop-in compatibility.
Read the original sources
AI-Buzz checked these pages on 9 Sept 2026. This is our reading on that date. The linked pages can change; we do not reconstruct earlier versions from today’s text.
- Claude model and parameter deprecations Opus 4.1 retirement; parameter deprecations; partner platforms
Review receipt
- Retrieved
- 9 September 2026 via web reader; exact retrieval time unavailable
- Response SHA-256
Unavailable: direct request denied; page checked through web reader
Manual review. Full source bytes were not retained. A hash cannot recover the page or establish when its wording changed.