@article{whydollmbasedwebagentsfailahierarchicalp,
  title = {Why Do LLM-based Web Agents Fail? A Hierarchical Planning Perspective},
  author = {Mohamed Aghzal and Gregory J. Stein and Ziyu Yao},
  year = {2026},
  eprint = {2603.14248},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2603.14248},
}