Claude AI performed nine-loop computation in the planar N=4 super-Yang–Mills model

Anthropic’s Claude artificial intelligence solved the nine-loop scattering amplitude calculation in the planar N=4 super-Yang–Mills model after running for several days in the Claude Science environment in response to a challenge from a month ago. The previous record was eight loops, set by Lance Dixon and collaborators; Dixon independently checked the result. The full computation cost a few thousand dollars, showing that progress on theoretical physics problems can be achieved with affordable resources using AI.