@article{espoearlystoppingproximalpolicyoptimizat,
  title = {ESPO: Early-Stopping Proximal Policy Optimization},
  author = {Zihang Li and Rui Zhou and Yingcheng Shi and Wenhan Yu and Zhewen Tan and Zixiang Liu and Zeming Li and Binhua Li and Yongbin Li and Tong Yang and Jieping Ye},
  year = {2026},
  eprint = {2605.29860},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.29860},
}