Claude Opus 4.1
Retired · Language, Reasoning · Primary source available
- Lifecycle
- Milestone or variant
- Related model
- Source event
- AI Radar coverage
- Only month or year known
- 7 events
2025
2026
As of 10 October 2026
Released +1
Deprecated
Retired
Predecessor Claude Opus 4
Successor Claude Opus 4.5
System card published
All events, in order
- Lineage Predecessor Claude Opus 4
- Source System card published
- Lifecycle Released
- Source Announcement published
- Lineage Successor Claude Opus 4.5
- Lifecycle Deprecated
- Lifecycle Retired
← The full record of Claude Opus 4.1, with every claim and its sources