
Claude Sonnet 5.5 Launches at Sonnet 5 Prices, With Scores Approaching Opus 5.5 — How It Compares With GPT-6 Sol
Anthropic has released Claude Sonnet 5.5. We compare its performance and pricing with Sonnet 5, Opus 5.5, and GPT-6 Sol, and explain how reasoning settings and caching affect real costs, plus what changes when migrating your API integration.








