Claude Sonnet 4.6 Model Brings 'Much-Improved Coding Skills', Upgraded Free Tier

Anthropic has released Claude Sonnet 4.6, the first upgrade to its mid-tier AI model since version 4.5 arrived in September 2025. The new model features a "1M token context window" and delivers a "full upgrade of the model's skills across coding, computer use, long-context reasoning, agent planning, knowledge work, and design." From Anthropic: Sonnet 4.6 brings much-improved coding skills to more of our users. Improvements in consistency, instruction following, and more have ...