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This study reveals a previously unexplored vulnerability in the safety alignment of Large Language Models (LLMs). Existing aligned LLMs predominantly respond to unsafe queries with refusals, which often begin with a fixed set of prefixes…

密码学与安全 · 计算机科学 2026-01-28 Yangyang Guo , Ziwei Xu , Si Liu , Zhiming Zheng , Mohan Kankanhalli

Large language models (LLMs) demonstrate remarkable capabilities but face challenges from hallucinations, which typically arise from insufficient knowledge or context. While instructing LLMs to acknowledge knowledge limitations by…

计算与语言 · 计算机科学 2025-08-08 Jiaqi Li , Yixuan Tang , Yi Yang

Despite their impressive performance on diverse tasks, large language models (LMs) still struggle with tasks requiring rich world knowledge, implying the limitations of relying solely on their parameters to encode a wealth of world…

计算与语言 · 计算机科学 2023-07-04 Alex Mallen , Akari Asai , Victor Zhong , Rajarshi Das , Daniel Khashabi , Hannaneh Hajishirzi

With the widespread adoption of large language models (LLMs), hallucinations, which are non-factual fabrications in model outputs, have become serious concerns. Reasoning capabilities have received attention as a self-verification process…

计算与语言 · 计算机科学 2026-01-06 Junichiro Niimi

While the capabilities of large language models (LLMs) have progressed significantly, their use in high-stakes applications have been limited due to risks of hallucination. One key approach in reducing hallucination is retrieval-augmented…

信息检索 · 计算机科学 2025-07-22 Jessica Foo , Pradyumna Shyama Prasad , Shaun Khoo

Small Language Models (SLMs) are a cost-effective alternative to Large Language Models (LLMs), but often struggle with complex reasoning due to their limited capacity and a tendency to produce mistakes or inconsistent answers during…

计算与语言 · 计算机科学 2025-08-19 Yuanfeng Xu , Zehui Dai , Jian Liang , Jiapeng Guan , Guangrun Wang , Liang Lin , Xiaohui Lv

Large Language Models (LLMs) often falter in complex reasoning tasks due to their static, parametric knowledge, leading to hallucinations and poor performance in specialized domains like mathematics. This work explores a fundamental…

机器学习 · 计算机科学 2026-02-10 Srijan Shakya , Anamaria-Roberta Hartl , Sepp Hochreiter , Korbinian Pöppel

Retrieval-augmented generation (RAG) generally enhances large language models' (LLMs) ability to solve knowledge-intensive tasks. But RAG may also lead to performance degradation due to imperfect retrieval and the model's limited ability to…

计算与语言 · 计算机科学 2025-05-29 Shuyang Cao , Karthik Radhakrishnan , David Rosenberg , Steven Lu , Pengxiang Cheng , Lu Wang , Shiyue Zhang

Recent works have shown that language models (LM) capture different types of knowledge regarding facts or common sense. However, because no model is perfect, they still fail to provide appropriate answers in many cases. In this paper, we…

计算与语言 · 计算机科学 2021-05-21 Zhengbao Jiang , Jun Araki , Haibo Ding , Graham Neubig

Despite their remarkable capabilities, large language models (LLMs) often produce responses containing factual inaccuracies due to their sole reliance on the parametric knowledge they encapsulate. Retrieval-Augmented Generation (RAG), an ad…

计算与语言 · 计算机科学 2023-10-19 Akari Asai , Zeqiu Wu , Yizhong Wang , Avirup Sil , Hannaneh Hajishirzi

Large Language Models (LLMs) have shown remarkable capabilities across diverse tasks, yet they face inherent limitations such as constrained parametric knowledge and high retraining costs. Retrieval-Augmented Generation (RAG) augments the…

信息检索 · 计算机科学 2025-08-26 Leqian Li , Dianxi Shi , Jialu Zhou , Xinyu Wei , Mingyue Yang , Songchang Jin , Shaowu Yang

Retrieval-augmented generation (RAG) improves large language models (LLMs) by using external knowledge to guide response generation, reducing hallucinations. However, RAG, particularly multi-modal RAG, can introduce new hallucination…

机器学习 · 计算机科学 2025-01-08 Matin Mortaheb , Mohammad A. Amir Khojastepour , Srimat T. Chakradhar , Sennur Ulukus

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…

计算与语言 · 计算机科学 2026-04-21 Ranganath Krishnan , Piyush Khanna , Omesh Tickoo

For Large Language Models (LLMs) to be reliably deployed in both everyday and high-stakes domains, knowing when not to answer is equally critical as answering correctly. Real-world user queries, which can be underspecified, ill-posed, or…

人工智能 · 计算机科学 2025-06-11 Polina Kirichenko , Mark Ibrahim , Kamalika Chaudhuri , Samuel J. Bell

Retrieval-Augmented Language Modeling (RALM) methods, which condition a language model (LM) on relevant documents from a grounding corpus during generation, were shown to significantly improve language modeling performance. In addition,…

计算与语言 · 计算机科学 2023-08-02 Ori Ram , Yoav Levine , Itay Dalmedigos , Dor Muhlgay , Amnon Shashua , Kevin Leyton-Brown , Yoav Shoham

Alignment is a standard procedure to fine-tune pre-trained large language models (LLMs) to follow natural language instructions and serve as helpful AI assistants. We have observed, however, that the conventional alignment process fails to…

计算与语言 · 计算机科学 2024-05-03 Sheng-Chieh Lin , Luyu Gao , Barlas Oguz , Wenhan Xiong , Jimmy Lin , Wen-tau Yih , Xilun Chen

Large language models (LLMs) encapsulate a vast amount of factual information within their pre-trained weights, as evidenced by their ability to answer diverse questions across different domains. However, this knowledge is inherently…

人工智能 · 计算机科学 2024-01-31 Oded Ovadia , Menachem Brief , Moshik Mishaeli , Oren Elisha

Hallucination, the generation of factually incorrect information, remains a significant challenge for large language models (LLMs), especially in open-domain long-form generation. Existing approaches for detecting hallucination in long-form…

Large Language Models (LLMs) excel in various language tasks but they often generate incorrect information, a phenomenon known as "hallucinations". Retrieval-Augmented Generation (RAG) aims to mitigate this by using document retrieval for…

信息检索 · 计算机科学 2024-07-18 Hamin Koo , Minseon Kim , Sung Ju Hwang

Recent advances in large language models (LLMs) have led to impressive progress in natural language generation, yet their tendency to produce hallucinated or unsubstantiated content remains a critical concern. To improve factual…

计算与语言 · 计算机科学 2025-05-20 Xukai Liu , Ye Liu , Shiwen Wu , Yanghai Zhang , Yihao Yuan , Kai Zhang , Qi Liu