Launched Claude Sonnet 4.6, our latest balanced model combining speed and intelligence. Sonnet 4.6 delivers improved agentic search performance while consuming fewer tokens. Supports extended thinking and a 1M token context window (beta).
API code execution is now free when used with web search or web fetch.
The web search tool and programmatic tool calling are now generally available (no beta header required). Web search and web fetch now support dynamic filtering.
The code execution tool, web fetch tool, tool search tool, tool use examples, and memory tool are now generally available (no beta header required).
Fetched April 10, 2026