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Large Language Models (LLMs) have shown propensity to generate hallucinated outputs, i.e., texts that are factually incorrect or unsupported. Existing methods for alleviating hallucinations typically require costly human annotations to…

Computation and Language · Computer Science 2024-04-03 Yu Xia , Xu Liu , Tong Yu , Sungchul Kim , Ryan A. Rossi , Anup Rao , Tung Mai , Shuai Li

Large language models are known to hallucinate when faced with unfamiliar queries, but the underlying mechanism that govern how models hallucinate are not yet fully understood. In this work, we find that unfamiliar examples in the models'…

Machine Learning · Computer Science 2024-05-30 Katie Kang , Eric Wallace , Claire Tomlin , Aviral Kumar , Sergey Levine

As Large Language Models become more ubiquitous across domains, it becomes important to examine their inherent limitations critically. This work argues that hallucinations in language models are not just occasional errors but an inevitable…

Machine Learning · Statistics 2024-09-10 Sourav Banerjee , Ayushi Agarwal , Saloni Singla

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

Multilingual pre-trained Large Language Models (LLMs) are incredibly effective at Question Answering (QA), a core task in Natural Language Understanding, achieving high accuracies on several multilingual benchmarks. However, little is known…

Computation and Language · Computer Science 2024-04-16 Yahan Yang , Soham Dan , Dan Roth , Insup Lee

Large language models (LLMs) often hallucinate, producing fluent but false information, partly because supervised fine-tuning (SFT) implicitly rewards always responding. We introduce $\textit{HypoTermInstruct}$, an SFT dataset (31,487…

Computation and Language · Computer Science 2026-03-19 Cem Uluoglakci , Tugba Taskaya Temizel

This paper primarily focuses on the hallucinations caused due to AI language models(LLMs).LLMs have shown extraordinary Language understanding and generation capabilities .Still it has major a disadvantage hallucinations which give outputs…

Computation and Language · Computer Science 2026-04-07 Sailesh kiran kurra , Shiek Ruksana , Vishal Borusu

Large Language Models (LLMs) have significantly advanced text generation capabilities, including tasks like summarization, often producing coherent and fluent outputs. However, faithfulness to source material remains a significant challenge…

Computation and Language · Computer Science 2026-01-14 Joonho Yang , Seunghyun Yoon , Hwan Chang , Byeongjeong Kim , Hwanhee Lee

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

Large Language Models (LLMs) are being rapidly adopted in agricultural imaging applications, ranging from crop interpretation to synthetic field image generation. However, these models frequently exhibit hallucinations outputs that appear…

Computer Vision and Pattern Recognition · Computer Science 2026-05-28 Partho Ghose , Al Bashir , Prem Raj , Azlan Zahid

Recently, there has been an explosion of large language models created through fine-tuning with data from larger models. These small models able to produce outputs that appear qualitatively similar to significantly larger models. However,…

Computation and Language · Computer Science 2024-11-05 Phil Wee , Riyadh Baghdadi

Hallucinations in large language models (LLMs) during summarization of patient-clinician dialogues pose significant risks to patient care and clinical decision-making. However, the phenomenon remains understudied in the clinical domain,…

We explore uncertainty quantification in large language models (LLMs), with the goal to identify when uncertainty in responses given a query is large. We simultaneously consider both epistemic and aleatoric uncertainties, where the former…

Machine Learning · Computer Science 2024-07-18 Yasin Abbasi Yadkori , Ilja Kuzborskij , András György , Csaba Szepesvári

The detection of sophisticated hallucinations in Large Language Models (LLMs) is hampered by a ``Detection Dilemma'': methods probing internal states (Internal State Probing) excel at identifying factual inconsistencies but fail on logical…

Computation and Language · Computer Science 2026-01-09 Yusheng Song , Lirong Qiu , Xi Zhang , Zhihao Tang

This paper investigates how hallucination rates in Large Language Models (LLMs) may be controlled via a symbolic data generation framework, exploring a fundamental relationship between the rate of certain mathematical errors and types of…

Computation and Language · Computer Science 2025-01-14 Jordan Meadows , Marco Valentino , Andre Freitas

Large Language Models (LLMs), including GPT-3.5, LLaMA, and PaLM, seem to be knowledgeable and able to adapt to many tasks. However, we still cannot completely trust their answers, since LLMs suffer from \textbf{hallucination}\textemdash…

Computation and Language · Computer Science 2024-08-06 Jia-Yu Yao , Kun-Peng Ning , Zhen-Hui Liu , Mu-Nan Ning , Yu-Yang Liu , Li Yuan

Large Vision-Language Models (LVLMs) have achieved significant success in recent years, and they have been extended to the medical domain. Although demonstrating satisfactory performance on medical Visual Question Answering (VQA) tasks,…

Computer Vision and Pattern Recognition · Computer Science 2025-03-18 Danfeng Guo , Demetri Terzopoulos

Recent advancements in large language models (LLMs) have considerably advanced the capabilities of summarization systems. However, they continue to face concerns about hallucinations. While prior work has evaluated LLMs extensively in news…

Computation and Language · Computer Science 2024-06-06 Sanjana Ramprasad , Elisa Ferracane , Zachary C. Lipton

Hallucinations, a phenomenon where a language model (LM) generates nonfactual content, pose a significant challenge to the practical deployment of LMs. While many empirical methods have been proposed to mitigate hallucinations, recent…

Computation and Language · Computer Science 2026-05-18 Atsushi Suzuki , Yulan He , Feng Tian , Zhongyuan Wang

Is automated hallucination detection possible? In this work, we introduce a theoretical framework to analyze the feasibility of automatically detecting hallucinations produced by large language models (LLMs). Inspired by the classical…

Machine Learning · Computer Science 2025-06-03 Amin Karbasi , Omar Montasser , John Sous , Grigoris Velegkas
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