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Claude Sonnet 5

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2026-09-28

Technology

  • Anthropic released Claude Sonnet 5.5, the second model in its 5.5 family, positioning it as a faster, lower-cost complement to Opus 5.5. The company says the new model runs 30% faster and costs up to 30% less for most work, with strengths in fixing bugs and creating polished documents and spreadsheets.

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