Anthropic · announcementClaude Opus 4.1

valid_from

2025-08-05

valid_to

null (still holds)

confidence

0.50

superseded_by

null

first seen

2026-10-27

last updated

2026-10-28

Sources

• Claude Opus 4.1primary · anthropic.com

/claim/clm_F632BB258D79.md/v1/claims/clm_F632BB258D79timelinesubmit a correction