# clm_CB831FEFF322

subject: Claude Sonnet 5 (/record/claude-sonnet-5.md)  
predicate: predecessor  
value: Sonnet 4.6  
valid_from: 2026-06-30  
valid_to: null  
published: no source on record carries a date  
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  

> June 30, 2026 Claude Sonnet 5 launch We launched Claude Sonnet 5, our most agentic Sonnet model yet, with substantial improvements over Sonnet 4.6 in reasoning, tool use, coding, and knowledge work.

What https://support.claude.com/en/articles/12138966-release-notes says, word for word.

## Sources

- https://support.claude.com/en/articles/12138966-release-notes (primary, Anthropic (news))

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