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Large language models (LLMs), despite their powerful capabilities, suffer from factual hallucinations where they generate verifiable falsehoods. We identify a root of this issue: the imbalanced data distribution in the pretraining corpus,…

Computation and Language · Computer Science 2026-02-03 Langming Liu , Kangtao Lv , Haibin Chen , Weidong Zhang , Yejing Wang , Shilei Liu , Xin Tong , Yujin Yuan , Yongwei Wang , Wenbo Su , Bo Zheng

Large language models (LLMs) have demonstrated strong mathematical reasoning capabilities but remain susceptible to hallucinations producing plausible yet incorrect statements especially in theorem proving, symbolic manipulation, and…

Artificial Intelligence · Computer Science 2025-06-23 MingShan Liu , Jialing Fang

While large language models (LLMs) have demonstrated remarkable capabilities across a range of downstream tasks, a significant concern revolves around their propensity to exhibit hallucinations: LLMs occasionally generate content that…

Computation and Language · Computer Science 2025-09-16 Yue Zhang , Yafu Li , Leyang Cui , Deng Cai , Lemao Liu , Tingchen Fu , Xinting Huang , Enbo Zhao , Yu Zhang , Chen Xu , Yulong Chen , Longyue Wang , Anh Tuan Luu , Wei Bi , Freda Shi , Shuming Shi

In recent studies, the extensive utilization of large language models has underscored the importance of robust evaluation methodologies for assessing text generation quality and relevance to specific tasks. This has revealed a prevalent…

Computation and Language · Computer Science 2024-03-20 Patanjali Bhamidipati , Advaith Malladi , Manish Shrivastava , Radhika Mamidi

Large Language Models (LLMs) have demonstrated impressive generative capabilities across diverse tasks but remain susceptible to hallucinations, confidently generated yet factually incorrect outputs. We introduce a reference-free,…

Computation and Language · Computer Science 2025-10-17 Keshav Kumar

Recent studies have examined attention dynamics in large vision-language models (LVLMs) to detect hallucinations. However, existing approaches remain limited in reliably distinguishing hallucinated from factually grounded outputs, as they…

Computer Vision and Pattern Recognition · Computer Science 2026-01-29 Xiaofeng Zhang , Yuanchao Zhu , Chaochen Gu , Xiaosong Yuan , Qiyan Zhao , Jiawei Cao , Feilong Tang , Sinan Fan , Yaomin Shen , Chen Shen , Hao Tang

Instruction tuned Large Vision Language Models (LVLMs) have significantly advanced in generalizing across a diverse set of multi-modal tasks, especially for Visual Question Answering (VQA). However, generating detailed responses that are…

Computer Vision and Pattern Recognition · Computer Science 2024-02-13 Anisha Gunjal , Jihan Yin , Erhan Bas

Self-improvement in multimodal large language models (MLLMs) is crucial for enhancing their reliability and robustness. However, current methods often rely heavily on MLLMs themselves as judges, leading to high computational costs and…

Computation and Language · Computer Science 2024-11-28 Shijian Deng , Wentian Zhao , Yu-Jhe Li , Kun Wan , Daniel Miranda , Ajinkya Kale , Yapeng Tian

Large language models(LLMs) excel at text generation and knowledge question-answering tasks, but they are prone to generating hallucinated content, severely limiting their application in high-risk domains. Current hallucination detection…

Computation and Language · Computer Science 2025-12-25 Shize Liang , Hongzhi Wang

Hallucinations in Large Language Models (LLMs), defined as the generation of content inconsistent with facts or context, represent a core obstacle to their reliable deployment in critical domains. Current research primarily focuses on…

Computation and Language · Computer Science 2026-03-20 Yanyi Liu , Qingwen Yang , Tiezheng Guo , Feiyu Qu , Jun Liu , Yingyou Wen

The issue of hallucinations is a prevalent concern in existing Large Vision-Language Models (LVLMs). Previous efforts have primarily focused on investigating object hallucinations, which can be easily alleviated by introducing object…

Computer Vision and Pattern Recognition · Computer Science 2024-07-19 Mingrui Wu , Jiayi Ji , Oucheng Huang , Jiale Li , Yuhang Wu , Xiaoshuai Sun , Rongrong Ji

Large language models (LLMs) have demonstrated remarkable performance on various natural language processing tasks. However, they are prone to generating fluent yet untruthful responses, known as "hallucinations". Hallucinations can lead to…

Computation and Language · Computer Science 2024-06-18 Minda Hu , Bowei He , Yufei Wang , Liangyou Li , Chen Ma , Irwin King

Large Language Models (LLMs) are being increasingly deployed in real-world applications, but they remain susceptible to hallucinations, which produce fluent yet incorrect responses and lead to erroneous decision-making. Uncertainty…

Machine Learning · Computer Science 2025-12-02 Huan Ma , Jiadong Pan , Jing Liu , Yan Chen , Joey Tianyi Zhou , Guangyu Wang , Qinghua Hu , Hua Wu , Changqing Zhang , Haifeng Wang

The surge in applications of large language models (LLMs) has prompted concerns about the generation of misleading or fabricated information, known as hallucinations. Therefore, detecting hallucinations has become critical to maintaining…

Machine Learning · Computer Science 2024-09-27 Xuefeng Du , Chaowei Xiao , Yixuan Li

While Large Language Models have transformed how we interact with AI systems, they suffer from a critical flaw: they confidently generate false information that sounds entirely plausible. This hallucination problem has become a major…

Artificial Intelligence · Computer Science 2025-10-28 Piyushkumar Patel

Large language models (LLMs) are susceptible to hallucinations -- factually incorrect outputs -- leading to a large body of work on detecting and mitigating such cases. We argue that it is important to distinguish between two types of…

Computation and Language · Computer Science 2025-02-19 Adi Simhi , Jonathan Herzig , Idan Szpektor , Yonatan Belinkov

Hallucinations in large language models (LLMs) are always seen as limitations. However, could they also be a source of creativity? This survey explores this possibility, suggesting that hallucinations may contribute to LLM application by…

Artificial Intelligence · Computer Science 2024-02-13 Xuhui Jiang , Yuxing Tian , Fengrui Hua , Chengjin Xu , Yuanzhuo Wang , Jian Guo

We develop a principled procedure for determining when a large language model (LLM) should abstain from responding (e.g., by saying "I don't know") in a general domain, instead of resorting to possibly "hallucinating" a non-sensical or…

Large language models (LLMs) have achieved impressive performance across a wide range of natural language processing tasks, yet they often produce hallucinated content that undermines factual reliability. To address this challenge, we…

Computation and Language · Computer Science 2026-03-23 Yaxin Zhao , Yu Zhang

Large Language Models (LLMs) have shown remarkable capabilities in tool calling and tool usage, but suffer from hallucinations where they choose incorrect tools, provide malformed parameters and exhibit 'tool bypass' behavior by performing…

Artificial Intelligence · Computer Science 2026-01-09 Kait Healy , Bharathi Srinivasan , Visakh Madathil , Jing Wu