# clm_47E7DC12D588

subject: Claude (/record/claude.md)  
predicate: feature_removed  
value: 1M token context window beta  
valid_from: 2026-04-30  
valid_to: null  
published: 2026-03-30  
recorded: 2026-11-01  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-01  
cite: AsOf. "Claude feature removed: 1M token context window beta", as of 2026-04-30. Claim clm_47E7DC12D588, https://asof.is/claim/clm_47E7DC12D588, accessed 2026-11-08. Source: https://platform.claude.com/docs/en/release-notes/overview#2026-03-30.  
checked: 2026-11-01 · its source page states the value and the date  

> April 30, 2026  We’ve retired the 1M token context window beta ( context-1m-2025-08-07 ) for Claude Sonnet 4.5 and Claude Sonnet 4.

What https://platform.claude.com/docs/en/release-notes/overview#2026-03-30 says, word for word.

## Sources

- https://platform.claude.com/docs/en/release-notes/overview#2026-03-30 (primary, Anthropic, published 2026-03-30)

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