@article{densegrpofromsparsetodenserewardforflowm,
  title = {DenseGRPO: From Sparse to Dense Reward for Flow Matching Model Alignment},
  author = {Haoyou Deng and Keyu Yan and Chaojie Mao and Xiang Wang and Yu Liu and Changxin Gao and Nong Sang},
  year = {2026},
  eprint = {2601.20218},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2601.20218},
}