@article{mogrpomitigatingrewardhackingofgrouprela,
  title = {MO-GRPO: Mitigating Reward Hacking of Group Relative Policy Optimization on Multi-Objective Problems},
  author = {Yuki Ichihara and Yuu Jinnai and Tetsuro Morimura and Mitsuki Sakamoto and Ryota Mitsuhashi and Eiji Uchibe},
  year = {2025},
  eprint = {2509.22047},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2509.22047},
}