@article{invisibletokensvisiblebillstheurgent,
  title = {Invisible Tokens, Visible Bills: The Urgent Need to Audit Hidden Operations in Opaque LLM Services},
  author = {Guoheng Sun and Ziyao Wang and Xuandong Zhao and Bowei Tian and Zheyu Shen and Yexiao He and Jinming Xing and Ang Li},
  year = {2025},
  eprint = {2505.18471},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2505.18471v1},
}