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Hallucination in large language models (LLMs) can be detected by assessing the uncertainty of model outputs, typically measured using entropy. Semantic entropy (SE) enhances traditional entropy estimation by quantifying uncertainty at the…

Machine Learning · Computer Science 2025-06-03 Dang Nguyen , Ali Payani , Baharan Mirzasoleiman

Large language models (LLMs) often generate responses that deviate from user input or training data, a phenomenon known as "hallucination." These hallucinations undermine user trust and hinder the adoption of generative AI systems.…

Computation and Language · Computer Science 2025-04-25 Yejin Bang , Ziwei Ji , Alan Schelten , Anthony Hartshorn , Tara Fowler , Cheng Zhang , Nicola Cancedda , Pascale Fung

Large Language Models (LLMs) are known to hallucinate, whereby they generate plausible but inaccurate text. This phenomenon poses significant risks in critical applications, such as medicine or law, necessitating robust hallucination…

Computation and Language · Computer Science 2024-10-23 Benedict Aaron Tjandra , Muhammed Razzak , Jannik Kossen , Kunal Handa , Yarin Gal

Large language models (LLMs) have revolutionized the field of natural language processing with their impressive reasoning and question-answering capabilities. However, these models are sometimes prone to generating credible-sounding but…

Computation and Language · Computer Science 2026-04-21 Ranganath Krishnan , Piyush Khanna , Omesh Tickoo

Large language models (LLMs) suffer from the hallucination problem and face significant challenges when applied to knowledge-intensive tasks. A promising approach is to leverage evidence documents as extra supporting knowledge, which can be…

Computation and Language · Computer Science 2024-04-25 Xinxin Zheng , Feihu Che , Jinyang Wu , Shuai Zhang , Shuai Nie , Kang Liu , Jianhua Tao

Large language models (LLMs) have shown incredible performance in completing various real-world tasks. The current paradigm of knowledge learning for LLMs is mainly based on learning from examples, in which LLMs learn the internal rule…

Computation and Language · Computer Science 2024-12-17 Wenkai Yang , Yankai Lin , Jie Zhou , Ji-Rong Wen

The emergence of large language models (LLMs) is a milestone in generative artificial intelligence, achieving significant success in text comprehension and generation tasks. Despite the tremendous success of LLMs in many downstream tasks,…

Computation and Language · Computer Science 2024-07-16 He Li , Haoang Chi , Mingyu Liu , Wenjing Yang

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

Hallucination is a major challenge for large language models (LLMs), preventing their further application in some fields. The skeptical thinking of humankind could be useful for LLMs to self-cognition, self-reflection and alleviate their…

Computation and Language · Computer Science 2025-04-29 Yetao Wu , Yihong Wang , Teng Chen , Ningyuan Xi , Qingqing Gu , Hongyang Lei , Luo Ji

Despite their impressive capacities, Large language models (LLMs) often struggle with the hallucination issue of generating inaccurate or fabricated content even when they possess correct knowledge. In this paper, we extend the exploration…

Computation and Language · Computer Science 2025-02-06 Jialiang Wu , Yi Shen , Sijia Liu , Yi Tang , Sen Song , Xiaoyi Wang , Longjun Cai

This work presents a framework for assessing whether large language models (LLMs) encode more factual knowledge in their parameters than what they express in their outputs. While a few studies hint at this possibility, none has clearly…

Computation and Language · Computer Science 2025-08-07 Zorik Gekhman , Eyal Ben David , Hadas Orgad , Eran Ofek , Yonatan Belinkov , Idan Szpektor , Jonathan Herzig , Roi Reichart

Despite the advancements made in Vision Large Language Models (VLLMs), like text Large Language Models (LLMs), they have limitations in addressing questions that require real-time information or are knowledge-intensive. Indiscriminately…

Computation and Language · Computer Science 2025-08-26 Zhuo Chen , Xinyu Wang , Yong Jiang , Zhen Zhang , Xinyu Geng , Pengjun Xie , Fei Huang , Kewei Tu

In recent years, multimodal large language models (MLLMs) have made significant progress but continue to face inherent challenges in multimodal reasoning, which requires multi-level (e.g., perception, reasoning) and multi-granular (e.g.,…

Computation and Language · Computer Science 2025-06-30 Zhitao He , Sandeep Polisetty , Zhiyuan Fan , Yuchen Huang , Shujin Wu , Yi R. Fung

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

Large Language Models (LLMs) have demonstrated strong performance in handling complex tasks requiring both extensive knowledge and reasoning abilities. However, the existing LLM inference pipeline operates as an opaque process without…

Computation and Language · Computer Science 2025-05-16 Mingyu Jin , Weidi Luo , Sitao Cheng , Xinyi Wang , Wenyue Hua , Ruixiang Tang , William Yang Wang , Yongfeng Zhang

Despite the many advances of Large Language Models (LLMs) and their unprecedented rapid evolution, their impact and integration into every facet of our daily lives is limited due to various reasons. One critical factor hindering their…

Computation and Language · Computer Science 2024-08-20 Yakir Yehuda , Itzik Malkiel , Oren Barkan , Jonathan Weill , Royi Ronen , Noam Koenigstein

Neural language models are black-boxes--both linguistic patterns and factual knowledge are distributed across billions of opaque parameters. This entangled encoding makes it difficult to reliably inspect, verify, or update specific facts.…

It is important for Large Language Models (LLMs) to be aware of the boundary of their knowledge, distinguishing queries they can confidently answer from those that lie beyond their capabilities. Such awareness enables models to perform…

Computation and Language · Computer Science 2026-03-05 Lihu Chen , Gerard de Melo , Fabian M. Suchanek , Gaël Varoquaux

Large Language Models (LLMs) suffer from hallucination problems, which hinder their reliability in sensitive applications. In the black-box setting, several self-consistency-based techniques have been proposed for hallucination detection.…

Computation and Language · Computer Science 2025-02-25 Yihao Xue , Kristjan Greenewald , Youssef Mroueh , Baharan Mirzasoleiman

The rapid emergence of Large Language Models (LLMs) has precipitated a profound paradigm shift in Artificial Intelligence, delivering monumental engineering successes that increasingly impact modern society. However, a critical paradox…

Computation and Language · Computer Science 2026-03-13 Zeyu Gan , Ruifeng Ren , Wei Yao , Xiaolin Hu , Gengze Xu , Chen Qian , Huayi Tang , Zixuan Gong , Xinhao Yao , Pengwei Tang , Zhenxing Dou , Yong Liu