Claude 3.7 Sonnet

**Anthropic** launched **Claude 3.7 Sonnet**, their most intelligent model to date featuring hybrid reasoning with two thinking modes: near-instant and extended step-by-step thinking. The release includes **Claude Code**, an agentic coding tool in limited preview, and supports a **128k output token capability** in beta. Claude 3.7 Sonnet performs well on coding benchmarks like **SWE-Bench Verified** and **Cognition's junior-dev eval**, and introduces advanced features such as streaming thinking, prompt caching, and tool use. The model is also benchmarked on **Pokebench**, reflecting agentic capabilities similar to the Voyager paper. The launch is accompanied by extensive documentation, cookbooks, and prompting guides for extended thinking. *"The first generally available hybrid reasoning model"* and *"first coding tool from Anthropic"* were highlighted in social media announcements.