Claude Sonnet 5.5 delivers 30% faster performance and lower token usage
September 28, 2026
Sonnet 5.5 improves speed by over 30% and reduces effective costs through higher token efficiency compared to Sonnet 5. The model features upgraded cybersecurity safeguards and improved alignment and honesty metrics on automated behavioral audits.
HOW THIS AFFECTS YOU
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builderYou can reduce latency and per-task costs by leveraging improved token efficiency in production workflows.
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founderLower operational costs and faster inference allow for more responsive agentic applications.