Anthropic launched Claude Sonnet 4.6, an upgrade over Sonnet 4.5, featuring broad improvements in coding, long-context reasoning, agent planning, knowledge work, and design, plus a 1M-token context window (beta). Benchmarks show Sonnet 4.6 leading on GDPval-AA ELO 1633, with significant token usage increases and improved output aesthetics.

Integrations include Cursor, Windsurf, Microsoft Foundry, and Perplexity Pro/Max. Early user feedback noted some regression issues that were later fixed. Pricing remains the same as Sonnet 4.5. Tooling enhancements include code execution for filtering results, improving accuracy and efficiency.