Claude · deprecated1M token context window beta

Valid from

2026-04-30

Valid until

still holds

Published

2026-04-30

Recorded by AsOf

2026-10-31

Checked

2026-10-31 · its source page states the value and the date

Confidence

0.70

Sources

“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 the page says, read 2026-10-31

• Claude Platform release notes, April 30, 2026primary · platform.claude.com · 2026-04-30

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