Author

Haojia Sun

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#artificial intelligence Jun 2026

OdysSim: Building Foundation Models for Human Behavior Simulation

It is shown that LLM-as-judge RL induces reward-hacking patterns, and that LLM-as-judge RL detectors can mitigate them during post-training, suggesting that behavioral foundation models require rethinking the LLM training paradigm.

Xuhui Zhou, Weiwei Sun, Weihua Du et al. · arXiv.org · 8 citations · ⚡1