# clm_DB3E1BAE0435

subject: Claude 3 Opus (/record/claude-3-opus.md)  
predicate: retired  
value: claude-3-opus-20240229  
valid_from: 2026-01-05  
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  

> January 5, 2026 We’ve retired the Claude Opus 3 model ( claude-3-opus-20240229 ).

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))

---

AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.