# clm_7AC3B47F24F1

subject: Claude Opus 4.6 (/record/claude-opus-4-6.md)  
predicate: deprecated  
value: fast mode  
valid_from: 2026-05-28  
valid_to: null  
published: 2026-05-28  
recorded: 2026-11-11  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-11  
cite: AsOf. "Claude Opus 4.6 deprecated: fast mode", as of 2026-05-28. Claim clm_7AC3B47F24F1, https://asof.is/claim/clm_7AC3B47F24F1, accessed 2026-11-11. Source: https://platform.claude.com/docs/en/release-notes/overview#2026-05-28.  
checked: 2026-11-11 · its source page states the value and the date  

> We’ve deprecated fast mode for Claude Opus 4.6, with removal approximately 30 days after launch. Migrate to fast mode for Claude Opus 4.8 or Claude Opus 4.7.

What https://platform.claude.com/docs/en/release-notes/overview#2026-05-28 says, word for word.

## Sources

- https://platform.claude.com/docs/en/release-notes/overview#2026-05-28 (primary, Anthropic, published 2026-05-28)

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