Claude Sonnet 4

High-performance model

Claude Sonnet 4 is Anthropic's hybrid reasoning model that balances performance with cost efficiency, offering both near-instant responses and extended thinking modes for deeper reasoning while significantly improving on its predecessor Claude Sonnet 3.7 across coding and reasoning tasks. The model achieves state-of-the-art performance with 72.7% on SWE-bench coding benchmarks and supports a 200K context window with up to 64K output tokens, making it ideal for general-purpose AI tasks including code generation, customer-facing AI agents, content analysis, and high-volume production applications.