On the morning of February 18, 2026, Anthropic unveiled its latest AI model, Claude Sonnet 4.6. This new iteration marks significant strides in coding, computer proficiency, long-context reasoning, agent planning, knowledge-based tasks, and design. Notably, it boasts an expanded context window of 1 million tokens, facilitating the handling of exceptionally large documents.

Free users are granted direct access to this model, while API pricing remains steady. In real-world office settings, Claude Sonnet 4.6's performance is on par with, or even outperforms, that of the premier Claude Opus 4.5. Developers, in particular, have lauded its coding consistency and adeptness at executing intricate, multi-step tasks. At present, Claude Sonnet 4.6 is fully accessible via the claude.ai web and mobile platforms, the Claude Cowork productivity suite, as well as through APIs and major cloud service providers.