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The increased use of large language models (LLMs) across a variety of real-world applications calls for mechanisms to verify the factual accuracy of their outputs. Difficulties lie in assessing the factuality of free-form responses in open…

Computation and Language · Computer Science 2025-10-30 Yuxia Wang , Minghan Wang , Hasan Iqbal , Georgi Georgiev , Jiahui Geng , Preslav Nakov

Evaluating the factuality of long-form large language model (LLM)-generated text is an important challenge. Recently there has been a surge of interest in factuality evaluation for English, but little is known about the factuality…

Computation and Language · Computer Science 2024-10-04 Sheikh Shafayat , Eunsu Kim , Juhyun Oh , Alice Oh

Large language models (LLMs) have shown remarkable capabilities in various natural language processing tasks, yet they often struggle with maintaining factual accuracy, particularly in knowledge-intensive domains like healthcare. This study…

Computation and Language · Computer Science 2024-11-01 Hieu Tran , Junda Wang , Yujan Ting , Weijing Huang , Terrence Chen

Large Language Models (LLMs) are widely used to generate plausible text on online platforms, without revealing the generation process. As users increasingly encounter such black-box outputs, detecting hallucinations has become a critical…

Computation and Language · Computer Science 2026-04-08 Joosung Lee , Cheonbok Park , Hwiyeol Jo , Jeonghoon Kim , Joonsuk Park , Kang Min Yoo

While hallucinations of large language models (LLMs) prevail as a major challenge, existing evaluation benchmarks on factuality do not cover the diverse domains of knowledge that the real-world users of LLMs seek information about. To…

Large language models (LLMs) have transformed the landscape of language processing, yet struggle with significant challenges in terms of security, privacy, and the generation of seemingly coherent but factually inaccurate outputs, commonly…

Software Engineering · Computer Science 2024-09-04 Ningke Li , Yuekang Li , Yi Liu , Ling Shi , Kailong Wang , Haoyu Wang

Large Language Models (LLMs) are increasingly used in various contexts, yet remain prone to generating non-factual content, commonly referred to as "hallucinations". The literature categorizes hallucinations into several types, including…

Computation and Language · Computer Science 2025-03-12 Samir Abdaljalil , Hasan Kurban , Erchin Serpedin

Faithfulness hallucinations are claims generated by a Large Language Model (LLM) not supported by contexts provided to the LLM. Lacking assessment standards, existing benchmarks focus on "factual statements" that rephrase source materials…

Computation and Language · Computer Science 2025-06-26 Xiaqiang Tang , Jian Li , Keyu Hu , Du Nan , Xiaolong Li , Xi Zhang , Weigao Sun , Sihong Xie

Large language models (LLMs) are known to hallucinate, producing natural language outputs that are not grounded in the input, reference materials, or real-world knowledge. In enterprise applications where AI features support business…

Computation and Language · Computer Science 2025-08-05 Hagyeong Shin , Binoy Robin Dalal , Iwona Bialynicka-Birula , Navjot Matharu , Ryan Muir , Xingwei Yang , Samuel W. K. Wong

Large language models (LLMs) have demonstrated impressive capabilities across diverse tasks, but they remain susceptible to hallucinations--generating content that appears plausible but contains factual inaccuracies. We present Finch-Zk, a…

Computation and Language · Computer Science 2025-11-04 Aman Goel , Daniel Schwartz , Yanjun Qi

Large language models (LMs) are prone to generate factual errors, which are often called hallucinations. In this paper, we introduce a comprehensive taxonomy of hallucinations and argue that hallucinations manifest in diverse forms, each…

Computation and Language · Computer Science 2024-08-14 Abhika Mishra , Akari Asai , Vidhisha Balachandran , Yizhong Wang , Graham Neubig , Yulia Tsvetkov , Hannaneh Hajishirzi

Hallucinations, the generation of apparently convincing yet false statements, remain a major barrier to the safe deployment of LLMs. Building on the strong performance of self-detection methods, we examine the use of structured knowledge…

Computation and Language · Computer Science 2025-12-30 Sahil Kale , Antonio Luca Alfeo

The rapid development of Large Language Models (LLMs) has transformed fake news detection and fact-checking tasks from simple classification to complex reasoning. However, evaluation frameworks have not kept pace. Current benchmarks are…

Computation and Language · Computer Science 2026-04-21 Cheng Xu , Changhong Jin , Yingjie Niu , Nan Yan , Yuke Mei , Shuhao Guan , Liming Chen , M-Tahar Kechadi

Fact tracing seeks to identify specific training examples that serve as the knowledge source for a given query. Existing approaches to fact tracing rely on assessing the similarity between each training sample and the query along a certain…

Computation and Language · Computer Science 2024-04-24 Si Chen , Feiyang Kang , Ning Yu , Ruoxi Jia

In recent years, large language models (LLMs) have demonstrated significant success in performing varied natural language tasks such as language translation, question-answering, summarizing, fact-checking, etc. Despite LLMs' impressive…

Computation and Language · Computer Science 2025-03-03 Bishwamittra Ghosh , Sarah Hasan , Naheed Anjum Arafat , Arijit Khan

Large language models (LLMs) are susceptible to generating inaccurate or false information, often referred to as "hallucinations" or "confabulations." While several technical advancements have been made to detect hallucinated content by…

Human-Computer Interaction · Computer Science 2025-08-12 Hyo Jin Do , Rachel Ostrand , Werner Geyer , Keerthiram Murugesan , Dennis Wei , Justin Weisz

Detecting factual errors in textual information, whether generated by large language models (LLM) or curated by humans, is crucial for making informed decisions. LLMs' inability to attribute their claims to external knowledge and their…

Computation and Language · Computer Science 2023-10-27 Farima Fatahi Bayat , Kun Qian , Benjamin Han , Yisi Sang , Anton Belyi , Samira Khorshidi , Fei Wu , Ihab F. Ilyas , Yunyao Li

State-of-the-art abstractive summarization systems often generate \emph{hallucinations}; i.e., content that is not directly inferable from the source text. Despite being assumed incorrect, we find that much hallucinated content is factual,…

Computation and Language · Computer Science 2021-12-07 Meng Cao , Yue Dong , Jackie Chi Kit Cheung

Despite the many advances of Large Language Models (LLMs) and their unprecedented rapid evolution, their impact and integration into every facet of our daily lives is limited due to various reasons. One critical factor hindering their…

Computation and Language · Computer Science 2024-08-20 Yakir Yehuda , Itzik Malkiel , Oren Barkan , Jonathan Weill , Royi Ronen , Noam Koenigstein

With the recent appearance of LLMs in practical settings, having methods that can effectively detect factual inconsistencies is crucial to reduce the propagation of misinformation and improve trust in model outputs. When testing on existing…

Computation and Language · Computer Science 2023-05-25 Philippe Laban , Wojciech Kryściński , Divyansh Agarwal , Alexander R. Fabbri , Caiming Xiong , Shafiq Joty , Chien-Sheng Wu