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Anthropic Introduces Claude Sonnet 5.5, Says It Is Over 30% Faster Than Sonnet 5
Anthropic says Claude Sonnet 5.5 runs more than 30% faster than Sonnet 5 and is aimed at everyday, well-scoped work, bug fixes, and polished documents, slides, and spreadsheets. The company says it is available everywhere today, with Claude Haiku 5.5 to join in the coming weeks.
Full Report
Anthropic has introduced Claude Sonnet 5.5, saying it runs more than 30% faster than Sonnet 5 and writes more clearly. The company positions it for quick back-and-forth and well-scoped everyday tasks, including fixing bugs and creating polished documents, slides, and spreadsheets. Anthropic also says the model has a strong eye for design.
Anthropic distinguishes Sonnet 5.5 from Claude Opus 5.5 by intended use: it describes Opus as built for complex work requiring careful judgment, while Sonnet is aimed at everyday tasks. The company says Sonnet 5.5 is available everywhere today and that Claude Haiku 5.5 will join the family in the coming weeks.
Why This Matters
The announcement gives users a clear distinction between the models’ stated roles: Opus for complex work requiring careful judgment, and Sonnet for everyday tasks such as coding fixes and document creation.
Evidence
Start with the primary evidence, then review supporting sources and context.
Primary Evidence
1Introducing Claude Sonnet 5.5
Claude
“Claude Sonnet 5.5 runs more than 30% faster than Sonnet 5 and writes more clearly, so it’s well suited to quick back-and-forth on the things you do most. Where Claude Opus 5.5 is built for complex work requiring careful judgment, Sonnet 5.5 is strongest at well-scoped everyday tasks, fixing bugs, and creating polished documents, slides, and spreadsheets.…”
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