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Large language model (LLM) agents increasingly rely on external memory to support long-horizon interaction, personalized assistance, and multi-step reasoning. However, existing memory systems still face three core challenges: they often…

Computation and Language · Computer Science 2026-04-30 Shannan Yan , Jingchen Ni , Leqi Zheng , Jiajun Zhang , Peixi Wu , Dacheng Yin , Jing Lyu , Chun Yuan , Fengyun Rao

Hallucinations pose a significant challenge to the reliability of large language models (LLMs) in critical domains. Recent benchmarks designed to assess LLM hallucinations within conventional NLP tasks, such as knowledge-intensive question…

Computation and Language · Computer Science 2024-09-17 Zhiying Zhu , Yiming Yang , Zhiqing Sun

Hallucination, a phenomenon where multimodal large language models~(MLLMs) tend to generate textual responses that are plausible but unaligned with the image, has become one major hurdle in various MLLM-related applications. Several…

Computer Vision and Pattern Recognition · Computer Science 2024-10-16 Han Qiu , Jiaxing Huang , Peng Gao , Qin Qi , Xiaoqin Zhang , Ling Shao , Shijian Lu

Large language models (LLMs) achieve strong question answering (QA) performance but can produce fluent answers unsupported by available evidence. Existing hallucination detectors often rely on external verification, repeated sampling, or…

Computation and Language · Computer Science 2026-05-29 Chaodong Tong , Qi Zhang , Zhuojun Jiang , Lei Jiang , Yanbing Liu

Large Language Models (LLMs) falter in multi-step interactions -- often hallucinating, repeating actions, or misinterpreting user corrections -- due to reliance on linear, unstructured context. This fragility stems from the lack of…

Artificial Intelligence · Computer Science 2025-05-27 Ye Ye

Hallucinations in large language models (LLMs) pose significant safety concerns that impede their broader deployment. Recent research in hallucination detection has demonstrated that LLMs' internal representations contain truthfulness…

Machine Learning · Computer Science 2025-11-11 Mengjia Niu , Hamed Haddadi , Guansong Pang

Despite the outstanding performance in multimodal tasks, Large Vision-Language Models (LVLMs) have been plagued by the issue of hallucination, i.e., generating content that is inconsistent with the corresponding visual inputs. While…

Computer Vision and Pattern Recognition · Computer Science 2026-02-26 Bei Yan , Jie Zhang , Zheng Yuan , Shiguang Shan , Xilin Chen

Large language models (LLMs) have demonstrated remarkable performance in text generation and knowledge-intensive question answering. Nevertheless, they are prone to producing hallucinated content, which severely undermines their reliability…

Computation and Language · Computer Science 2026-03-09 Shize Liang , Hongzhi Wang

Hallucinations in machine translation are translations that contain information completely unrelated to the input. Omissions are translations that do not include some of the input information. While both cases tend to be catastrophic errors…

Uncertainty estimation is a necessary component when implementing AI in high-risk settings, such as autonomous cars, medicine, or insurances. Large Language Models (LLMs) have seen a surge in popularity in recent years, but they are subject…

Machine Learning · Computer Science 2024-12-09 Gabriel Y. Arteaga , Thomas B. Schön , Nicolas Pielawski

The widespread adoption of large language models (LLMs) across diverse AI applications is proof of the outstanding achievements obtained in several tasks, such as text mining, text generation, and question answering. However, LLMs are not…

Computation and Language · Computer Science 2023-11-15 Alessandro Bruno , Pier Luigi Mazzeo , Aladine Chetouani , Marouane Tliba , Mohamed Amine Kerkouri

Modern LLM-based agents and chat assistants rely on long-term memory frameworks to store reusable knowledge, recall user preferences, and augment reasoning. As researchers create more complex memory architectures, it becomes increasingly…

Machine Learning · Computer Science 2026-05-25 Alina Shutova , Alexandra Olenina , Ivan Vinogradov , Anton Sinitsin

Large language models (LLMs), such as ChatGPT, are prone to generate hallucinations, i.e., content that conflicts with the source or cannot be verified by the factual knowledge. To understand what types of content and to which extent LLMs…

Computation and Language · Computer Science 2023-10-24 Junyi Li , Xiaoxue Cheng , Wayne Xin Zhao , Jian-Yun Nie , Ji-Rong Wen

Multimodal hallucination in multimodal large language models (MLLMs) restricts the correctness of MLLMs. However, multimodal hallucinations are multi-sourced and arise from diverse causes. Existing benchmarks fail to adequately distinguish…

Computer Vision and Pattern Recognition · Computer Science 2025-06-03 Bowen Dong , Minheng Ni , Zitong Huang , Guanglei Yang , Wangmeng Zuo , Lei Zhang

Working memory (WM), a fundamental cognitive process facilitating the temporary storage, integration, manipulation, and retrieval of information, plays a vital role in reasoning and decision-making tasks. Robust benchmark datasets that…

Neurons and Cognition · Quantitative Biology 2023-11-02 Ankur Sikarwar , Mengmi Zhang

Despite their powerful chat, coding, and reasoning abilities, Large Language Models (LLMs) frequently hallucinate. Conventional wisdom suggests that hallucinations are a consequence of a balance between creativity and factuality, which can…

Humans excel at remembering concrete experiences along spatiotemporal contexts and performing reasoning across those events, i.e., the capacity for episodic memory. In contrast, memory in language agents remains mainly semantic, and current…

Artificial Intelligence · Computer Science 2026-03-03 Yiheng Shu , Saisri Padmaja Jonnalagedda , Xiang Gao , Bernal Jiménez Gutiérrez , Weijian Qi , Kamalika Das , Huan Sun , Yu Su

AI applications driven by multimodal large language models (MLLMs) are prone to hallucinations and pose considerable risks to human users. Crucially, such hallucinations are not equally problematic: some hallucination contents could be…

Artificial Intelligence · Computer Science 2026-04-09 Jianhong Pang , Ruoxi Cheng , Ziyi Ye , Xingjun Ma , Zuxuan Wu , Xuanjing Huang , Yu-Gang Jiang

The Large Visual Language Models (LVLMs) enhances user interaction and enriches user experience by integrating visual modality on the basis of the Large Language Models (LLMs). It has demonstrated their powerful information processing and…

Artificial Intelligence · Computer Science 2024-10-22 Wei Lan , Wenyi Chen , Qingfeng Chen , Shirui Pan , Huiyu Zhou , Yi Pan

Recent development of Large Vision-Language Models (LVLMs) has attracted growing attention within the AI landscape for its practical implementation potential. However, ``hallucination'', or more specifically, the misalignment between…

Computer Vision and Pattern Recognition · Computer Science 2024-05-07 Hanchao Liu , Wenyuan Xue , Yifei Chen , Dapeng Chen , Xiutian Zhao , Ke Wang , Liping Hou , Rongjun Li , Wei Peng