AAAI 2026technical0 citations
SpecDetect: Simple, Fast, and Training-Free Detection of LLM-Generated Text via Spectral Analysis
Haitong Luo, Weiyao Zhang, Suhang Wang, Wenji Zou, Chungang Lin, Xuying Meng, Yujun Zhang
Abstract
The proliferation of high-quality text from Large Language Models (LLMs) demands reliable and efficient detection methods. While existing training-free approaches show promise, they often rely on surface-level statistics and overlook fundamental signal properties of the text generation process. In this work, we reframe detection as a signal processing problem, introducing a novel paradigm that analyzes the sequence of token log-probabilities in the frequency domain. By systematically analyzing the signal
BibTeX
@inproceedings{aaai2026_specdetectsimple,
title = {SpecDetect: Simple, Fast, and Training-Free Detection of LLM-Generated Text via Spectral Analysis},
author = {Haitong Luo and Weiyao Zhang and Suhang Wang and Wenji Zou and Chungang Lin and Xuying Meng and Yujun Zhang},
booktitle = {AAAI 2026},
year = {2026}
}