Introducing Claude Sonnet 5

Claude Sonnet 5 is Anthropic's most agentic model to date, designed to handle complex, multi-step tasks such as autonomous coding, debugging, and system navigation. It bridges the performance gap between previous Sonnet models and the more powerful Opus-class models, providing high-quality results at a lower cost. In addition to performance gains, the model features enhanced safety protocols, including reduced hallucination rates and integrated cyber safeguards. Claude Sonnet 5 is now available across all Anthropic plans and platforms, with introductory pricing in effect until August 31, 2026.

(Source：Anthropic)