Claude Sonnet 4.5
Deprecated · Language, Multimodal, Reasoning · Primary source available
- Lifecycle
- Milestone or variant
- Related model
- Source event
- AI Radar coverage
- Only month or year known
- 6 events
2025
2026
As of 10 October 2026
Released +1
Deprecated
Predecessor Claude Sonnet 4
Successor Claude Sonnet 4.6
System card published
All events, in order
- Lineage Predecessor Claude Sonnet 4
- Source System card published
- Lifecycle Released
- Source Announcement published
- Lineage Successor Claude Sonnet 4.6
- Lifecycle Deprecated
← The full record of Claude Sonnet 4.5, with every claim and its sources