Claude computes a nine-loop amplitude using established physics methods
Anthropic reported that Claude Science used Fable 5.1 to compute a six-particle planar N=4 super Yang-Mills amplitude at nine loops through two established methods. Physicist Lance Dixon independently checked the result, while another human-led group reached much of the same result with GPT-6 assistance.
Why it matters: The result shows a long-running agent can execute a fragile frontier calculation, organize code and compute, and produce an output experts can validate. It is evidence for scientific workflow execution, not evidence that the model discovered new physical…