@article{longattnselectinglongcontexttrainingdata,
  title = {LongAttn: Selecting Long-context Training Data via Token-level Attention},
  author = {Longyun Wu and Dawei Zhu and Guangxiang Zhao and Zhuocheng Yu and Junfeng Ran and Xiangyu Wong and Lin Sun and Sujian Li},
  year = {2025},
  eprint = {2502.16860},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2502.16860v1},
}