# clm_63FF7EBBE2C1

subject: Claude Fable 5 (/record/claude-fable-5.md)  
predicate: model_release  
value: Claude Fable 5  
valid_from: 2026-06-09  
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 9, 2026 We’ve launched Claude Fable 5 ( claude-fable-5 ), our most capable model open to all customers, alongside Claude Mythos 5 ( claude-mythos-5 ) for Project Glasswing participants.

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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