Author

Guanhua Chen

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Preprint Aug 2026

Fisher-R1: Training LLM Agents for Reliable Hypothesis Testing

P-Bench is built, a benchmark comprising 425 open-ended, realistic hypothesis-testing tasks spanning economics, biology, and medicine and introduces Fisher-R1, an open-weight LLM agent trained for rigorous hypothesis testing using synthetic tasks and reinforcement learning.

Jia-Cheng Miao, Jin Mu, Guanhua Chen et al. · 0 citations