Claude Sonnet 5.5

Sep
29
Claude Sonnet 5.5 headline beside a chart showing Anthropic’s up to 30% lower task cost and Artificial Analysis’s about 50% higher result at max effort, from separate evaluations.

Claude Sonnet 5.5 is faster, but task cost depends on effort

Anthropic claims up to 30% lower cost per task. Artificial Analysis measured $7.60 per task at max effort, about 50% above Sonnet 5. Two request settings that worked with Sonnet 5 now return 400 errors.
3 min read