Claude Opus 4.1
Claude Opus 4.1 lifts SWE-bench Verified to 74.5% with better multi-file refactoring and agentic search, at Opus 4 pricing.
A drop-in upgrade to Opus 4: SWE-bench Verified 74.5% (company-run), stronger multi-file code refactoring, and better detail tracking and agentic search for research and data analysis. Same price as Opus 4. Available to paid Claude users, Claude Code, the API, Bedrock and Vertex AI.
- Date
- Tuesday, 5 August 2025
- Lab
- Anthropic
- Kind
- model
- Access
- closed API
- Price
- $15/$75 per M tokens in/out, same as Opus 4
Figures
| Measure | Value | Measured by |
|---|---|---|
| SWE-bench Verified | 74.5% Claude Opus 4.1 | company |
API ID claude-opus-4-1-20250805; retired from the Claude API on 2026-08-05 (platform release notes).
Sources
This record was checked against its sources on 6 October 2026. How we check