@article{posttrainingisaboutstatesnottokensastate,
  title = {Post-Training is About States, Not Tokens: A State Distribution View of SFT, RL, and On-Policy Distillation},
  author = {Dong Nie},
  year = {2026},
  eprint = {2605.22731},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.22731},
}