@article{adatiradaptivetoolintegratedreasoningvia,
  title = {AdaTIR: Adaptive Tool-Integrated Reasoning via Difficulty-Aware Policy Optimization},
  author = {Zhaiyu Fang and Ruipeng Sun},
  year = {2026},
  eprint = {2601.14696},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2601.14696},
}