Model retired
| claude-sonnet-4-5-20250929 | Deprecated | September 30, 2026 | November 30, 2026 |
Anthropic
Claude Sonnet 4.5
Explore Claude Sonnet 4.5 specifications, lifecycle details, and availability across coding agents, with links to official Anthropic sources.
Lifecycle
RetiredRelease date
Coming soon
Availability
Available in
Availability remains unknown until verified coding-agent sources are connected.
Specifications
Model details
- Context window
- 200,000 tokens
- Max output
- 64,000 tokens
- Input types
- Image, Text
- Output types
- Text
- Reasoning support
- Supported
- Vision support
- Supported
- API availability
- Available
- Knowledge cutoff
- Jan 2025
Changelog
Recent changes
Sources / Verification
Official sources used for this model.
VerificationOfficial source