@article{policyguidedstepwisemodelroutingforcoste,
  title = {Policy-Guided Stepwise Model Routing for Cost-Effective Reasoning},
  author = {Wenwen Si and Insup Lee and Osbert Bastani},
  year = {2026},
  eprint = {2605.06116},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.06116},
}