What Claude’s Nine-Loop Physics Result Really Means
Claude Fable 5.1 completed a nine-loop six-particle amplitude in planar N=4 super Yang-Mills using a bootstrap workflow, Python, and roughly a week of 96-CPU compute. The result is less a story about machine intuition than about AI executing fragile, research-grade calculations. ([anthropic.com](https://www.anthropic.com/research/yes-claude-can-do-nine-loops))