@article{thedepthceilingonthelimitsoflargelanguag,
  title = {The Depth Ceiling: On the Limits of Large Language Models in Discovering Latent Planning},
  author = {Yi Xu and Philipp Jettkant and Laura Ruis},
  year = {2026},
  eprint = {2604.06427},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2604.06427},
}