Claude Sonnet 4.6 brings improved coding, computer usage and office tasks

Anthropic updated its Sonnet model to version 4.6 today, and the company says it’s the most capable Sonnet model yet, with upgrades in coding, computer usage, long context reasoning, agent scheduling, knowledge work, and design.

Claude Sonnet 4.6 is the default for users who have Free and Pro plans and has an updated 1M token popup.

Sonnet 4.6 improves consistency and coding guidelines, is better at computer use tasks, and can complete office tasks that previously required an Opus model. Sonnet 4.6 has human-level capabilities for tasks such as navigating a complex spreadsheet or filling out a multi-step web form.

According to Anthropic, Sonnet 4.6 has a “broadly warm, sincere, prosocial, and occasionally humorous character, a very strong security demeanor, and no sign of serious concerns about high-stakes forms of noncompliance.” It offers Opus-level intelligence at a more affordable price, making it practical for a wider range of tasks. Opus 4.6 is still the best choice for agent coding, agent code usage, and multidisciplinary reasoning, but Sonnet 4.6 offers measurable improvements over Sonnet 4.5.

Claude 4.6 is available for all Claude plans as of today, and Anthropic has also provided users with free file creation, connectors, skills, and compression.