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Sonnet 5.5 vs Opus 5.5 High on my-mini-bench and comparison with Sonnet 5
I tested them on tasks from my own work: data conversion, frontend, refactoring and running task evaluations.
Setup: 10 tasks × 3 runs, High reasoning, in pi-agent and Claude Code through harbor.
Sonnet
Introducing Claude Sonnet 5.5, the second model in the Claude 5.5 family.
It’s a clear upgrade over Sonnet 5, runs more than 30% faster, and costs up to 30% less for most work.
