# clm_9E086858DDB3

subject: Anthropic (/record/anthropic.md)  
predicate: released  
value: API version 2026-10-21  
valid_from: 2026-10-21  
valid_to: null  
published: 2026-10-21  
recorded: 2026-11-05  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-05  
cite: AsOf. "Anthropic released: API version 2026-10-21", as of 2026-10-21. Claim clm_9E086858DDB3, https://asof.is/claim/clm_9E086858DDB3, accessed 2026-11-08. Source: https://platform.claude.com/docs/en/release-notes/overview#2026-10-21.  
checked: 2026-11-05 · its source page states the value and the date  

> October 21, 2026  We’ve released API version 2026-10-21 .

What https://platform.claude.com/docs/en/release-notes/overview#2026-10-21 says, word for word.

## Sources

- https://platform.claude.com/docs/en/release-notes/overview#2026-10-21 (primary, Anthropic, published 2026-10-21)

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