# clm_E34BF75C9F5E

subject: Claude (/record/claude.md)  
predicate: discontinued  
value: Claude Sonnet 3.5 models  
valid_from: 2025-10-28  
valid_to: null  
published: 2025-10-28  
recorded: 2026-11-03  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-03  
checked: 2026-11-03 · its source page states the value and the date  

> October 28, 2025  We announced the deprecation of the Claude Sonnet 3.7 model. Read more in Model deprecations . We’ve retired the Claude Sonnet 3.5 models. All requests to these models will now return an error.

What https://platform.claude.com/docs/en/release-notes/overview#2025-10-28 says, word for word.

## Sources

- https://platform.claude.com/docs/en/release-notes/overview#2025-10-28 (primary, Anthropic, published 2025-10-28)

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