Claude Fable 5.1 Completes Frontier Nine-Loop Particle Physics Calculation Experts Chased for Years
141_1337 · reddit · 2026-09-26
Anthropic's research blog reports that Claude Fable 5.1 completed a frontier nine-loop particle-physics calculation that domain experts had worked toward for years. Researchers mostly just told the model to "keep going" while it built, debugged, and ran the entire workflow itself — a landmark demonstration of autonomous long-horizon scientific computation by a frontier model.
Related event: Claude Breaks Nine-Loop Physics Record, Scooping Human Team(27 posts)→
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