# clm_FA6CD34DEE94

subject: Claude (/record/claude.md)  
predicate: deprecated  
value: Claude Sonnet 4.5  
valid_from: 2026-09-30  
valid_to: null  
published: 2026-09-30  
recorded: 2026-10-31  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-10-31  
checked: 2026-10-31 · its source page states the value and the date  

> We announced the deprecation of the Claude Sonnet 4.5 model ( claude-sonnet-4-5-20250929 ), with retirement on the Claude API scheduled for November 30, 2026.

What https://platform.claude.com/docs/en/release-notes/overview#2026-09-30 says, word for word.

## Sources

- https://platform.claude.com/docs/en/release-notes/overview#2026-09-30 (primary, Anthropic, published 2026-09-30)

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