Claude Sonnet 4
Claude Sonnet 4 upgrades Sonnet 3.7 with 72.7% on SWE-bench Verified at unchanged $3/$15 pricing.
Mid-tier model scoring 72.7% on SWE-bench Verified (company-run), marginally above Opus 4's 72.5%, at a fifth of Opus's price. Same extended-thinking-with-tools and parallel tool execution features as Opus 4. Its context window later grew to 1M tokens in beta (2025-08-12).
- Date
- Thursday, 22 May 2025
- Lab
- Anthropic
- Kind
- model
- Access
- closed API
- Price
- $3/$15 per M tokens in/out
Figures
| Measure | Value | Measured by |
|---|---|---|
| SWE-bench Verified | 72.7% Claude Sonnet 4 | company |
Retired from the Claude API on 2026-06-15 (platform release notes). Free-tier availability at launch was not checked.
Sources
This record was checked against its sources on 6 October 2026. How we check