Anthropic has released Claude Opus 5, a new model designed to power long-running agents while delivering significant improvements in coding and professional work. It is positioned as a step-change improvement for the Opus tier, offering performance close to Claude Fable 5 at half the cost.
- On Frontier-Bench v0.1, Opus 5 surpasses all other models and more than doubles Opus 4.8’s performance at a lower cost per task.
- It achieves near Fable-level performance on CursorBench 3.2 at max effort but at half the cost per task.
- On ARC-AGI 3, Opus 5’s score is three times as high as the next-best model.
- The model shows notable improvements in scientific research, particularly in organic chemistry and protein-related tasks.
- It is now the default model on Claude Max and the strongest model on Claude Pro.
Opus 5 is designed to be used daily, working more efficiently than previous models and excelling at verifying its work and iterating carefully until it succeeds.