Anthropic · announcementIntroducing Claude Opus 4.5

valid_from

2025-11-24

valid_to

null (still holds)

confidence

0.50

superseded_by

null

first seen

2026-10-27

last updated

2026-10-28

Sources

• Introducing Claude Opus 4.5primary · anthropic.com

/claim/clm_7A8A72CF4932.md/v1/claims/clm_7A8A72CF4932timelinesubmit a correction