# clm_320E94CA1F36

subject: Claude Sonnet 4 (/record/claude-sonnet-4.md)  
predicate: predecessor  
value: Claude Sonnet 3.7  
valid_from: 2025-05-22  
valid_to: null  
published: 2025-05-22  
recorded: 2026-11-04  
confidence: 0.95  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-04  
checked: 2026-11-04 · its source page states the value and the date  

> Claude Sonnet 4 is a significant upgrade to Claude Sonnet 3.7, delivering superior coding and reasoning while responding more precisely to your instructions.

What https://www.anthropic.com/news/claude-4 says, word for word.

## Sources

- https://www.anthropic.com/news/claude-4 (primary, Anthropic, published 2025-05-22)

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