# clm_FA2834065240

subject: Claude 1 (/record/claude-1.md)  
predicate: deprecated  
value: claude-1.3  
valid_from: 2024-09-04  
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  

> On September 4, 2024, Anthropic notified developers using Claude 1 and Instant models of their upcoming retirements.

What https://platform.claude.com/docs/en/about-claude/model-deprecations says, word for word.

## Sources

- https://platform.claude.com/docs/en/about-claude/model-deprecations (primary, Anthropic (docs, model deprecations))

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