@inproceedings{sun-etal-2026-coin,
    title = "{C}o{I}n: Counting the Invisible Reasoning Tokens in Commercial Opaque {LLM} {API}s",
    author = "Sun, Guoheng  and
      Wang, Ziyao  and
      Tian, Bowei  and
      Liu, Meng  and
      Shen, Zheyu  and
      He, Shwai  and
      He, Yexiao  and
      Ye, Wanghao  and
      Wang, Yiting  and
      Li, Ang",
    editor = "Lee, Hung-Yi  and
      Dev, Sunipa  and
      Li, Jessy  and
      Elliott, Desmond",
    booktitle = "Findings of the {A}ssociation for {C}omputational {L}inguistics: {EMNLP} 2026",
    month = oct,
    year = "2026",
    address = "Budapest, Hungary",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/2026.findings-emnlp.363/",
    pages = "7594--7620",
    ISBN = "979-8-89176-462-0"
}