Anthropic
Claude Opus 5 is a new model that delivers frontier-level intelligence close to Claude Fable 5 at half the price, achieving state-of-the-art results on coding and knowledge work benchmarks like Frontier-Bench and GDPval-AA. It more than doubles the performance of its predecessor Opus 4.8 at lower cost, with significant improvements in software engineering, scientific research, computer use, and agentic tasks. It becomes the new default model on Claude Max and the strongest model on Claude Pro.