# clm_5D6D78810CBD

subject: Claude (/record/claude.md)  
predicate: context_window  
value: 1M token context window  
valid_from: 2026-03-30  
valid_to: 2026-04-20  
published: 2026-03-30  
recorded: 2026-11-01  
confidence: 0.70  
status: superseded  
assertable: true  
superseded_by: clm_849B1F10CFD0  
last_updated: 2026-11-01  
cite: AsOf. "Claude context window: 1M token context window", as of 2026-03-30 (until 2026-04-20). Claim clm_5D6D78810CBD, https://asof.is/claim/clm_5D6D78810CBD, 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  

> To continue using 1M context windows, migrate to Claude Sonnet 4.6 or Claude Opus 4.6 , which support the full 1M token context window at standard pricing with no beta header required.

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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