07:25
2026-07-25
latent.space
artificial-intelligence
[AINews] Claude Opus 5: Fable-level performance at Opus price (half Fable)
Anthropic launched Claude Opus 5, achieving an ECI of 159 and matching Fable 5 on SWE-ECI at 161, according to Epoch AI Research. Independent evaluations show Opus 5 outperforming Fable in coding and …