Claude Sonnet 5.5

Claude Sonnet 5.5

Anthropic's second model in the Claude 5.5 family

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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.

APIDeveloper ToolsArtificial Intelligence

Claude Sonnet 5.5 screenshot

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👍 227 💬 5 comments 🕐 September 29, 2026

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📋 Details

Launched

September 29, 2026

Upvotes

227

Comments

5

Source

Public data

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