Anthropic has introduced Claude Sonnet 4.6 as the new default AI model for both free and paid users. The update brings significant improvements in logical reasoning, coding, and general computer tasks. All without extra cost. This version replaces the previous Sonnet model and features a beta 1 million-token context window, allowing the AI to handle large codebases, long documents, and complex tasks in a single request.
Testers report better instruction-following, stronger reasoning abilities, and near-Opus-level performance across many workflows. The upgrade highlights the trend of making powerful AI capabilities more widely accessible and intensifies competition in the generative AI space.