Claude Sonnet 4
Claude Sonnet 4 significantly enhances the capabilities of its predecessor, Sonnet 3.7, excelling in both coding and reasoning tasks with improved precision and controllability. Achieving state-of-the-art performance on SWE-bench (72.7%), Sonnet 4 balances capability and computational efficiency, making it suitable for a broad range of applications from routine coding tasks to complex software development projects. Key enhancements include improved autonomous codebase navigation, reduced error rates in agent-driven workflows, and increased reliability in following intricate instructions. Sonnet 4 is optimized for practical everyday use, providing advanced reasoning capabilities while maintaining efficiency and responsiveness in diverse internal and external scenarios. Read more at the blog post here
Capabilities
Supported Parameters
Pricing Comparison
| Router | Input / 1M | Output / 1M | Cached Input / 1M |
|---|---|---|---|
| Requesty★ | $3.00 | $15.00 | $0.30 |
| OpenRouter | $3.00 | $15.00 | $0.30 |
| Vercel AI | $3.00 | $15.00 | — |
| Martian | $3.00 | $15.00 | $0.30 |
Benchmarks
Model IDs
bedrock/claude-sonnet-4@us-east-2anthropic/claude-sonnet-4