Anthropic Says Claude Cracked A Nine-Loop Yang-Mills Amplitude, Beating A 2023 Human Record

Anthropic said on 25 September that Claude Fable 5.1, running on ~96 CPUs for a week and $100-$2,000 of compute, computed the six-particle scattering amplitude in N=4 super-Yang-Mills theory to nine loops — one loop past the record Lance Dixon set in 2023.