Anthropic releases Claude 4
Claude Opus 4 and Claude Sonnet 4 launch, with Anthropic calling Opus 4 the world's best coding model. Claude Code becomes generally available.
Model summary
- Developer
- Anthropic
- Availability
- Claude apps (Sonnet 4 also on the free plan), API, major clouds
Reported benchmark results
| SWE-bench Verified | 72.5% | Opus 4; Sonnet 4: 72.7% |
| Terminal-bench | 43.2% | Opus 4 |
Data source: Anthropic announcement. Scores are as published by the developer at launch. Test conditions differ between companies, so compare with care.