While Large language models (LLMs) have garnered widespread applications across various domains due to their powerful language understanding and generation capabilities, the detection of non-factual or hallucinatory content generated by LLMs remains scarce. Currently, one significant challenge in hallucination detection is the laborious task of time-consuming and expensive manual annotation of the hallucinatory generation. To address this issue, this paper first introduces a method for automatically constructing model-specific hallucination datasets based on existing fact-checking datasets called AutoHall. Furthermore, we propose a zero-resource and black-box hallucination detection method based on self-contradiction. We conduct experiments towards prevalent open-/closed-source LLMs, achieving superior hallucination detection performance compared to extant baselines. Moreover, our experiments reveal variations in hallucination proportions and types among different models.

该论文提出了AutoHall方法，通过自相矛盾的方式自动构建模型特定的幻觉数据集，然后基于这些数据集实现了无资源和黑盒幻觉检测方法，对开源和闭源大型语言模型进行了实验证明，在幻觉检测性能上优于现有基准模型，并且发现了不同模型之间的幻觉比例和类型的差异。

AutoHall: 大型语言模型的自动幻觉数据集生成