@article{whathappensbeforedecodingprefilldetermin,
  title = {What Happens Before Decoding? Prefill Determines GUI Grounding in VLMs},
  author = {Jiaping Lin and Fei Shen and Junzhe Li and Ping Nie and Fei Yu and Ming Li and Haizhou Li},
  year = {2026},
  eprint = {2605.12549},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.12549},
}