Anthropic company blog

Sonnet 5.5

Claude Sonnet 5.5 is a clear upgrade over Claude Sonnet 5, runs 30%+ faster, and costs up to 30% less for most work.
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AI & Machine LearningTech Industry & Business2026

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Sep 28, 2026Sonnet 5.5 by D2OQZG8l5BI1S06884613

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