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In the age of misinformation, hallucination - the tendency of Large Language Models (LLMs) to generate non-factual or unfaithful responses - represents the main risk for their global utility. Despite LLMs becoming increasingly multilingual,…

Computation and Language · Computer Science 2026-02-03 Saad Obaid ul Islam , Anne Lauscher , Goran Glavaš

Chinese Large Language Models (LLMs) have recently demonstrated impressive capabilities across various NLP benchmarks and real-world applications. However, the existing benchmarks for comprehensively evaluating these LLMs are still…

Computation and Language · Computer Science 2024-03-20 Chuang Liu , Renren Jin , Yuqi Ren , Deyi Xiong

Hallucination in Large Language Models (LLMs) is a well studied problem. However, the properties that make LLM intrinsically vulnerable to hallucinations have not been identified and studied. This research identifies and characterizes the…

Computation and Language · Computer Science 2025-09-15 Naveen Lamba , Sanju Tiwari , Manas Gaur

Large language models (LLMs) are starting to complement traditional information seeking mechanisms such as web search. LLM-powered chatbots like ChatGPT are gaining prominence among the general public. AI chatbots are also increasingly…

Computation and Language · Computer Science 2025-11-25 Vibhor Agarwal , Yiqiao Jin , Mohit Chandra , Munmun De Choudhury , Srijan Kumar , Nishanth Sastry

As the capabilities of large language models (LLMs) continue to advance, evaluating their performance becomes increasingly crucial and challenging. This paper aims to bridge this gap by introducing CMMLU, a comprehensive Chinese benchmark…

Computation and Language · Computer Science 2024-01-19 Haonan Li , Yixuan Zhang , Fajri Koto , Yifei Yang , Hai Zhao , Yeyun Gong , Nan Duan , Timothy Baldwin

Hallucination is a well-known phenomenon in text generated by large language models (LLMs). The existence of hallucinatory responses is found in almost all application scenarios e.g., summarization, question-answering (QA) etc. For…

Computation and Language · Computer Science 2023-12-11 Mobashir Sadat , Zhengyu Zhou , Lukas Lange , Jun Araki , Arsalan Gundroo , Bingqing Wang , Rakesh R Menon , Md Rizwan Parvez , Zhe Feng

We present the system developed by the Central China Normal University (CCNU) team for the Mu-SHROOM shared task, which focuses on identifying hallucinations in question-answering systems across 14 different languages. Our approach…

Computation and Language · Computer Science 2025-05-20 Xu Liu , Guanyi Chen

Large Language Models (LLMs) have gained widespread adoption in various natural language processing tasks, including question answering and dialogue systems. However, a major drawback of LLMs is the issue of hallucination, where they…

Computation and Language · Computer Science 2024-07-08 Yuyan Chen , Qiang Fu , Yichen Yuan , Zhihao Wen , Ge Fan , Dayiheng Liu , Dongmei Zhang , Zhixu Li , Yanghua Xiao

This survey presents a comprehensive analysis of the phenomenon of hallucination in multimodal large language models (MLLMs), also known as Large Vision-Language Models (LVLMs), which have demonstrated significant advancements and…

Computer Vision and Pattern Recognition · Computer Science 2025-04-03 Zechen Bai , Pichao Wang , Tianjun Xiao , Tong He , Zongbo Han , Zheng Zhang , Mike Zheng Shou

Hallucination continues to be one of the most critical challenges in the institutional adoption journey of Large Language Models (LLMs). While prior studies have primarily focused on the post-generation analysis and refinement of outputs,…

Machine Learning · Computer Science 2024-12-17 William Watson , Nicole Cho , Nishan Srishankar

Large Language Models(LLMs) have demonstrated remarkable performance across various natural language processing tasks; however, how to comprehensively and accurately assess their performance becomes an urgent issue to be addressed. This…

Computation and Language · Computer Science 2024-02-27 Xiaotian Zhang , Chunyang Li , Yi Zong , Zhengyu Ying , Liang He , Xipeng Qiu

Hallucination has been a major problem for large language models and remains a critical challenge when it comes to multimodality in which vision-language models (VLMs) have to deal with not just textual but also visual inputs. Despite rapid…

Computer Vision and Pattern Recognition · Computer Science 2024-07-23 Zhecan Wang , Garrett Bingham , Adams Yu , Quoc Le , Thang Luong , Golnaz Ghiasi

Large vision-language models (LVLMs) are prone to hallucinations, where certain contextual cues in an image can trigger the language module to produce overconfident and incorrect reasoning about abnormal or hypothetical objects. While some…

Computer Vision and Pattern Recognition · Computer Science 2024-10-10 Xiyang Wu , Tianrui Guan , Dianqi Li , Shuaiyi Huang , Xiaoyu Liu , Xijun Wang , Ruiqi Xian , Abhinav Shrivastava , Furong Huang , Jordan Lee Boyd-Graber , Tianyi Zhou , Dinesh Manocha

Multimodal Large Language Models (MLLMs) often generate hallucinations, where the output deviates from the visual content. Given that these hallucinations can take diverse forms, detecting hallucinations at a fine-grained level is essential…

Computer Vision and Pattern Recognition · Computer Science 2026-04-07 Yuiga Wada , Kazuki Matsuda , Komei Sugiura , Graham Neubig

Hallucinations in large language models (LLMs) - instances where models generate plausible but factually incorrect information - present a significant challenge for AI. We introduce "Ask a Local", a novel hallucination detection method…

Computation and Language · Computer Science 2025-06-05 Aldan Creo , Héctor Cerezo-Costas , Pedro Alonso-Doval , Maximiliano Hormazábal-Lagos

Concerns regarding the propensity of Large Language Models (LLMs) to produce inaccurate outputs, also known as hallucinations, have escalated. Detecting them is vital for ensuring the reliability of applications relying on LLM-generated…

Computation and Language · Computer Science 2024-05-31 Ernesto Quevedo , Jorge Yero , Rachel Koerner , Pablo Rivas , Tomas Cerny

The increasing reliance on natural language generation (NLG) models, particularly large language models, has raised concerns about the reliability and accuracy of their outputs. A key challenge is hallucination, where models produce…

Computation and Language · Computer Science 2025-10-23 Fan Xu , Xinyu Hu , Zhenghan Yu , Li Lin , Xu Zhang , Yang Zhang , Wei Zhou , Jinjie Gu , Xiaojun Wan

Large language models (LLMs) have transformed natural language processing, achieving remarkable performance across diverse tasks. However, their impressive fluency often comes at the cost of producing false or fabricated information, a…

Computation and Language · Computer Science 2026-03-20 Aisha Alansari , Hamzah Luqman

Large Language Models (LLMs) have significantly advanced the field of Natural Language Processing (NLP), achieving remarkable performance across diverse tasks and enabling widespread real-world applications. However, LLMs are prone to…

Computation and Language · Computer Science 2024-06-12 Wen Luo , Tianshu Shen , Wei Li , Guangyue Peng , Richeng Xuan , Houfeng Wang , Xi Yang

The recent advancements in Large Language Models (LLMs) have garnered widespread acclaim for their remarkable emerging capabilities. However, the issue of hallucination has parallelly emerged as a by-product, posing significant concerns.…