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Hallucinations in Large Language Models (LLMs) -- generations that are plausible but factually unfaithful -- remain a critical barrier to high-stakes deployment. Current detection methods typically rely on computationally expensive external…

Artificial Intelligence · Computer Science 2026-01-23 Manish Bhatt

In recent years, large language models (LLMs) have made remarkable advancements, yet hallucination, where models produce inaccurate or non-factual statements, remains a significant challenge for real-world deployment. Although current…

Computation and Language · Computer Science 2025-06-03 Qing Li , Jiahui Geng , Zongxiong Chen , Derui Zhu , Yuxia Wang , Congbo Ma , Chenyang Lyu , Fakhri Karray

Multilingual Large Language Models(MLLMs) demonstrate strong generalization across languages, yet they remain prone to hallucinations, especially in low-resource languages, due to training data imbalances. These hallucinations, which…

Computation and Language · Computer Science 2025-07-22 Weihua Zheng , Roy Ka-Wei Lee , Zhengyuan Liu , Kui Wu , AiTi Aw , Bowei Zou

Retrieval-Augmented Generation (RAG) reduces hallucinations by grounding answers in retrieved evidence, yet standard retrievers often exhibit retrieval sycophancy: they preferentially surface evidence that supports a user's premise, even…

Computation and Language · Computer Science 2025-12-29 Mayank Ravishankara

Large language models and vision transformers have demonstrated impressive zero-shot capabilities, enabling significant transferability in downstream tasks. The fusion of these models has resulted in multi-modal architectures with enhanced…

Computer Vision and Pattern Recognition · Computer Science 2025-01-07 Andrés Villa , Juan León Alcázar , Motasem Alfarra , Vladimir Araujo , Alvaro Soto , Bernard Ghanem

Despite the significant advancements in Large Vision-Language Models (LVLMs), their tendency to generate hallucinations undermines reliability and restricts broader practical deployment. Among the hallucination mitigation methods, feature…

Computer Vision and Pattern Recognition · Computer Science 2026-05-20 Tiantian Dang , Chao Bi , Shufan Shen , Jinzhe Liu , Qingming Huang , Shuhui Wang

Face hallucination is a technique that reconstruct high-resolution (HR) faces from low-resolution (LR) faces, by using the prior knowledge learned from HR/LR face pairs. Most state-of-the-arts leverage position-patch prior knowledge of…

Computer Vision and Pattern Recognition · Computer Science 2018-09-18 Junjun Jiang , Yi Yu , Suhua Tang , Jiayi Ma , Akiko Aizawa , Kiyoharu Aizawa

Recently evolved large reasoning models (LRMs) show powerful performance in solving complex tasks with long chain-of-thought (CoT) reasoning capability. As these LRMs are mostly developed by post-training on formal reasoning tasks, whether…

Computation and Language · Computer Science 2025-05-30 Zijun Yao , Yantao Liu , Yanxu Chen , Jianhui Chen , Junfeng Fang , Lei Hou , Juanzi Li , Tat-Seng Chua

LLMs frequently generate fictitious yet convincing citations, often expressing high confidence even when the underlying reference is wrong. We study this failure across 9 models and 108{,}000 generated references, and find that author names…

Computation and Language · Computer Science 2026-04-22 Yuefei Chen , Yihao Quan , Xiaodong Lin , Ruixiang Tang

Large language models (LLMs) can generate fluent natural language texts when given relevant documents as background context. This ability has attracted considerable interest in developing industry applications of LLMs. However, LLMs are…

Computation and Language · Computer Science 2023-10-11 Deren Lei , Yaxi Li , Mengya Hu , Mingyu Wang , Vincent Yun , Emily Ching , Eslam Kamal

LLMs are often claimed to be capable of Natural Language Inference (NLI), which is widely regarded as a cornerstone of more complex forms of reasoning. However, recent works show that LLMs still suffer from hallucinations in NLI due to…

Computation and Language · Computer Science 2025-03-17 Liang Cheng , Tianyi Li , Zhaowei Wang , Tianyang Liu , Mark Steedman

Large Reasoning Models (LRMs) have shown impressive capabilities in multi-step reasoning tasks. However, alongside these successes, a more deceptive form of model error has emerged--Reasoning Hallucination--where logically coherent but…

Artificial Intelligence · Computer Science 2025-05-20 Zhongxiang Sun , Qipeng Wang , Haoyu Wang , Xiao Zhang , Jun Xu

Large Language Models (LLMs) have gained significant popularity for their impressive performance across diverse fields. However, LLMs are prone to hallucinate untruthful or nonsensical outputs that fail to meet user expectations in many…

Computation and Language · Computer Science 2023-11-23 Tianhang Zhang , Lin Qiu , Qipeng Guo , Cheng Deng , Yue Zhang , Zheng Zhang , Chenghu Zhou , Xinbing Wang , Luoyi Fu

Large Language Models (LLMs) driven by In-Context Learning (ICL) have significantly improved the performance of text-to-SQL. Previous methods generally employ a two-stage reasoning framework, namely 1) schema linking and 2) logical…

Computation and Language · Computer Science 2024-05-27 Ge Qu , Jinyang Li , Bowen Li , Bowen Qin , Nan Huo , Chenhao Ma , Reynold Cheng

Machine Translation (MT) is undergoing a paradigm shift, with systems based on fine-tuned large language models (LLM) becoming increasingly competitive with traditional encoder-decoder models trained specifically for translation tasks.…

Computation and Language · Computer Science 2025-01-30 Zilu Tang , Rajen Chatterjee , Sarthak Garg

Fixed representational capacity is a fundamental constraint in continual learning: practitioners must guess an appropriate model width before training, without knowing how many distinct concepts the data contains. We propose LACE…

Machine Learning · Computer Science 2026-03-31 Shivnath Tathe

Large language models (LLMs) often generate hallucinations -- unsupported content that undermines reliability. While most prior works frame hallucination detection as a binary task, many real-world applications require identifying…

Large Language Models (LLMs) often generate factually incorrect outputs, commonly termed hallucinations, that undermine trust and limit deployment in high-stakes settings. Existing hallucination detection methods typically require multiple…

Artificial Intelligence · Computer Science 2026-05-28 Mattia J. Villani , Pranav Deshpande , Akshay Seshadri , Romina Yalovetzky , Niraj Kumar

Abstractive text summarization has garnered increased interest as of late, in part due to the proliferation of large language models (LLMs). One of the most pressing problems related to generation of abstractive summaries is the need to…

Computation and Language · Computer Science 2023-10-17 Grant C. Forbes , Parth Katlana , Zeydy Ortiz

The generation of factually incorrect objects, commonly known as object hallucination, remains a persistent challenge in Large Vision-Language Models (LVLMs). Current approaches to address this issue - ranging from expensive data-driven…

Artificial Intelligence · Computer Science 2026-05-26 Yuanzhi Xu , Qian Gao , Jun Fan , Guohui Ding , Zhenyu Yang , Sixue Lin , Yuteng Xiao