A NeurIPS 2026 reviewer received entirely LLM-generated rebuttals for an LLM-generated paper.

The r/MachineLearning post describes "Claude-speak everywhere" in both submission and author responses, with the authors acknowledging LLM assistance. NeurIPS desk-rejected hundreds of position-track papers flagged by AI detectors earlier this cycle and sanctions no LLM use during review outside a voluntary experiment. The rebuttal stage wasn't previously the pressure point, and there's no detection or policy machinery aimed at it.