Anthropic Claude Sonnet 5 vs Sonnet 4.6 vs Opus 4.8: Agentic Coding Benchmarks, API Pricing, and Cost-Performance Tradeoffs Compared
Anthropic launched Claude Sonnet 5, its most agentic mid-tier model, on June 30, 2026, beating Sonnet 4.6 on all published benchmarks including SWE-bench Pro (63.2%) and OSWorld-Verified (81.2%). The model offers effort …