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GPT-6 Astra solved 49 of 50 unpublished theoretical-physics problems, and the experts' answer key turned out to be wrong

AspireAI community · arXiv (Chandra et al., ICTS / Google DeepMind / Harvard / KU Leuven)
Thirty-five physicists gave AI agents 50 unpublished theoretical-physics problems, and GPT-6 Astra solved 49 of them. The suite spans 11 subfields, from fluid dynamics to quantum field theory, and every answer is machine-checkable. On the track where agents could search the web, Astra in Codex got 49 of 50 at under $3 a problem. Opus 5.5 got 46, Gemini 3.8 Flash 34, open-weight DeepSeek 27 and GLM 21. The part worth sitting with: several answers the physicists marked wrong turned out to be errors in the experts' own reference solutions. Caveat: one pass per agent, and the authors say some contributors used AI while writing the problems. https://arxiv.org/abs/2610.16733
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