Claude Sonnet 5.5, the mid-sized model in Anthropic's 5.5 family, scored 73.3 on the Great Commission Benchmark in a run completed October 10, 2026. Across 150 prompts it accepted 94, compromised 32, and refused 24. That is a 34-point gain over Claude Sonnet 4.6 (39.7), and it places Sonnet 5.5 betw