Anthropic ships Claude Opus 5: near-Fable-5 intelligence at half the price
Anthropic released Claude Opus 5, presenting it as close to the frontier intelligence of Claude Fable 5 at half the price and the new state of the art on coding and knowledge-work evaluations such as Frontier-Bench v0.1 and GDPval-AA, though it remains behind Mythos 5 on cybersecurity tasks.
Opus 5 more than doubles Opus 4.8's performance on Frontier-Bench v0.1 at a lower cost per task, and at max effort lands within 0.5% of Fable 5's peak CursorBench 3.2 score at half the cost per task. It is now the default model on Claude Max and the strongest model on Claude Pro, with an effort setting that lets users trade tokens for speed and cost.

WHY IT MATTERS
A frontier-class coding model at half the price resets the cost-per-task math for agentic coding, which is exactly where harness spend piles up.






