Claude Sonnet 5.5

Claude Sonnet 5.5

Anthropic's second model in the Claude 5.5 family

Product screenshot

About

Claude Sonnet 5.5 is Anthropic’s fast, cost-efficient AI model for everyday work: coding, bug fixes, documents, slides, and design. It runs 30%+ faster than Sonnet 5, lowers task costs up to 30%, and delivers stronger coding and knowledge-work performance.