@article{arenaasofflinerewardefficientfinegrained,
  title = {Arena as Offline Reward: Efficient Fine-Grained Preference Optimization for Diffusion Models},
  author = {Zhikai Li and Yue Zhao and Edward Zhongwei Zhang and Xuewen Liu and Jing Zhang and Qingyi Gu and Zhen Dong},
  year = {2026},
  eprint = {2605.06070},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.06070},
}