Anthropic launches Claude Sonnet 5.5 with faster output

Anthropic has launched Claude Sonnet 5.5, the second model in its Claude 5.5 family and a direct upgrade to Sonnet 5. The company positions it as its fastest Sonnet yet, built for well-scoped everyday work such as bug fixes, documents, slides, spreadsheets, and design. It is meant to complement Opus 5.5, which remains the stronger choice for complex, open-ended jobs that require sustained judgment, including demanding coding, longer assignments, visual understanding, slide creation, and UI design.

First reported by TestingCatalog. This page is a short excerpt; the full text is theirs.