product · fact
Claude Opus 4.1 release date
As of November 4, 2026, the AsOf record says Claude Opus 4.1 was released on August 5, 2025, from a primary source (platform.claude.com). The record holds 1 claim on Claude Opus 4.1's release, 1 still open and 0 superseded, each dated and sourced; a replaced value is closed with an end date, never deleted.
- current release date
- Claude Opus 4.1
Every dated value
| value | valid from | valid to | status | conf | sources | claim |
|---|---|---|---|---|---|---|
| Claude Opus 4.1 | 2025-08-05 | valid | 1 source for release date Claude Opus 4.1 | clm_234B67F53ADD |
Questions this record answers
- When was Claude Opus 4.1 released?