Claude Sonnet 4.6 is Anthropic's most capable Sonnet model that represents a full upgrade across multiple domains including coding, computer use, long-context reasoning, agent planning, knowledge work, and design. The model features a 1M token context window in beta, allowing it to handle extensive content while reasoning effectively across all that context.

Key capabilities include significantly improved coding skills with better consistency and instruction following, major improvements in computer use skills for navigating complex software, enhanced long-horizon planning abilities, and polished visual outputs with better layouts and design sensibility. The model shows human-level capability in tasks like navigating complex spreadsheets or filling out multi-step web forms while pulling together information across multiple browser tabs.

Sonnet 4.6 operates with improved computer use capabilities that allow it to interact with software similarly to how humans do - clicking virtual mice and typing on virtual keyboards without requiring special APIs or purpose-built connectors. The model demonstrates effective reasoning across its 1M token context window, enabling better performance on long-horizon tasks and complex multi-step planning scenarios.

Benefits include approaching Opus-level intelligence at a more practical price point, making frontier-level reasoning accessible for more tasks. Users report needing fewer rounds of iteration to reach production-quality results, with particular strengths in frontend code, financial analysis, complex code fixes, bug detection, and enterprise document comprehension.

The model targets developers, enterprises, and organizations needing AI capabilities for coding, document processing, business automation, and complex reasoning tasks. It integrates with Claude Developer Platform, Claude Cowork, Claude Code, API, major cloud platforms, and supports features like adaptive thinking, extended thinking, context compaction, web search tools, fetch tools, and code execution.