This is Claude Sonnet 4.6: our most capable Sonnet model yet. It’s a full upgrade across coding, computer use, long-context reasoning, agent planning, knowledge work, and design. It also features a 1M token context window in beta.

Sonnet 4.6 has improved on benchmarks across the board. It approaches Opus-level intelligence at a price point that makes it practical for far more tasks.

Sonnet 4.6 also shows a major improvement in computer use skills. Early users are seeing human-level capability on tasks like complex spreadsheets and multi-step web forms.

For Claude in Excel users, our add-in now supports MCP connectors, letting Claude work with tools like S&P Global, LSEG, Daloopa, PitchBook, Moody’s and FactSet. Pull in context from outside your spreadsheet without ever leaving Excel.

On the Claude API, web search and fetch tools are more accurate and token-efficient with dynamic filtering. Also now generally available: code execution, memory, programmatic tool calling, tool search, and tool use examples. Read more: