Beyond the Final Actor: Modeling the Dual Roles of Creator and Editor for Fine-Grained LLM-Generated Text Detection

In three linesNew RACE method detects LLM-generated text across 4 fine-grained categories (pure human, pure LLM, human-polished-by-LLM, humanized-LLM). Uses Rhetorical Structure Theory (RST) and Elementary Discourse Unit (EDU)-level features. Outperforms 12 baselines with low false alarms.

Summary generated by Claude — human-verified