Liam Fitzpatrick

New Capabilities

As of September 2026: Co-led the Claude nine-loop computation

A small physics calculation just became a marker for AI capability. The six-particle scattering amplitude in planar N=4 super-Yang-Mills, a favorite testing ground for theorists, had sat at eight loops since 2023—until Anthropic's Claude pushed it to nine in late August 2026, running unsupervised for days at a cost of a few thousand dollars.

Updated Sep 28