Back
AnthropicClaude API
We've launched Claude Sonnet 4.6, our latest balanced model combining speed and intelligence for everyday…
AI summary
Written by AI from the official notes. Check them for exact details.Claude Sonnet 4.6 has been launched with improved performance and new features.
- Improved agentic search performance with fewer token consumption.
- Supports extended thinking and a 1M token context window (beta).
- API code execution is now free with web search or web fetch.
- Dynamic filtering for web search and web fetch enhances performance.
- Multiple tools no longer require a beta header.
Why it matters: Users of Claude should care for enhanced performance and cost efficiency in their tasks.
Full release notes4 changes
- We've launched Claude Sonnet 4.6, our latest balanced model combining speed and intelligence for everyday tasks. Sonnet 4.6 delivers improved agentic search performance while consuming fewer tokens. Sonnet 4.6 supports extended thinking and a 1M token context window (beta). See Models & Pricing for details.
- API code execution is now free when used with web search or web fetch. Sandboxed code execution improves model capability and token efficiency. See the pricing details for standalone usage.
- The web search tool and programmatic tool calling are available with no beta header required. Web search and web fetch now support dynamic filtering, which uses code execution to filter results before they reach the context window for better performance and reduced token cost.
- The code execution tool, web fetch tool, tool search tool, tool use examples, and memory tool no longer require a beta header.