Claude · context window1M token context window

Superseded: a later claim replaced it. It was the record's answer for the dates it held.

Valid from

2026-02-05

Valid until

2026-02-17

Published

2026-02-05

Recorded by AsOf

2026-11-02

Checked

2026-11-02 · its source page states the value and the date

Confidence

0.70

Replaced by

clm_180AF3A05000

Sources

“The 1M token context window is now available in beta for Claude Opus 4.6, in addition to Sonnet 4.5 and Sonnet 4. Long context pricing applies to requests exceeding 200k input tokens.”— what the page says, read 2026-11-02

• Claude Platform release notes, February 5, 2026primary · platform.claude.com · 2026-02-05

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