# clm_8BE1B4110AE7

subject: Claude Opus 4.8 (/record/claude-opus-4-8.md)  
predicate: model_release  
value: Claude Opus 4.8  
valid_from: 2026-05-28  
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  

> May 28, 2026 We’ve launched Claude Opus 4.8 ( claude-opus-4-8 ), our most capable model.

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

## Sources

- https://platform.claude.com/docs/en/release-notes/overview (primary, Anthropic (Claude Platform release notes))

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