Anthropic introduced Claude Sonnet 5.5 in its 5.5 model family. It positions the model for well-scoped work, bug fixing and creating documents, presentations and spreadsheets.
The company reports over 30% higher speed and up to 30% lower cost for much work compared with Sonnet 5. Real-world value depends on the task and setup; these are company-reported results, not a guarantee for every project.
If you are selecting a model, test representative tasks and weigh output quality, latency and cost instead of relying on the model name alone.
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