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Retrieval-augmented generation (RAG) systems empower large language models (LLMs) to access external knowledge during inference. Recent advances have enabled LLMs to act as search agents via reinforcement learning (RL), improving…

Artificial Intelligence · Computer Science 2025-11-06 Pengcheng Jiang , Xueqiang Xu , Jiacheng Lin , Jinfeng Xiao , Zifeng Wang , Jimeng Sun , Jiawei Han

Retrieval-augmented generation (RAG) is a popular technique for using large language models (LLMs) to build customer-support, question-answering solutions. In this paper, we share our team's practical experience building and maintaining…

Information Retrieval · Computer Science 2024-10-18 Sarah Packowski , Inge Halilovic , Jenifer Schlotfeldt , Trish Smith

Retrieval-Augmented Generation (RAG) enhances Large Language Models (LLMs) by grounding responses in external knowledge during inference. However, conventiona RAG systems under-perform on structured tabular data, largely due to coarse…

Computation and Language · Computer Science 2026-05-05 Zebin Guo , Weidong Geng , Ruichen Mao

Retrieval-augmented generation (RAG) methods can enhance the performance of LLMs by incorporating retrieved knowledge chunks into the generation process. In general, the retrieval and generation steps usually have different requirements for…

Information Retrieval · Computer Science 2025-04-16 Peiru Yang , Xintian Li , Zhiyang Hu , Jiapeng Wang , Jinhua Yin , Huili Wang , Lizhi He , Shuai Yang , Shangguang Wang , Yongfeng Huang , Tao Qi

Recent advances have extended the context window of frontier LLMs dramatically, from a few thousand tokens up to millions, enabling entire books and codebases to fit into context. However, the compute costs of inferencing long-context LLMs…

Information Retrieval · Computer Science 2024-12-10 Nicholas Alonso , Beren Millidge

In high-stakes information domains such as healthcare, where large language models (LLMs) can produce hallucinations or misinformation, retrieval-augmented generation (RAG) has been proposed as a mitigation strategy, grounding model outputs…

Information Retrieval · Computer Science 2026-04-07 Saeedeh Javadi , Sara Mirabi , Manan Gangar , Bahadorreza Ofoghi

Recent advancements in Large Language Models (LLMs) have played a significant role in reducing human workload across various domains, a trend that is increasingly extending into the medical field. In this paper, we propose an automated…

Computation and Language · Computer Science 2026-03-30 Kyomin Hwang , Nojun Kwak

Large Language Models (LLMs) are capable of natural language understanding and generation. But they face challenges such as hallucination and outdated knowledge. Fine-tuning is one possible solution, but it is resource-intensive and must be…

Computation and Language · Computer Science 2025-07-01 Shadman Sobhan , Mohammad Ariful Haque

Retrieval augmented generation (RAG) has been widely adopted to help Large Language Models (LLMs) to process tasks involving long documents. However, existing retrieval models are not designed for long document retrieval and fail to address…

Information Retrieval · Computer Science 2026-02-13 David Jiahao Fu , Lam Thanh Do , Jiayu Li , Kevin Chen-Chuan Chang

Retrieval-augmented generation (RAG) enhances the question-answering (QA) abilities of large language models (LLMs) by integrating external knowledge. However, adapting general-purpose RAG systems to specialized fields such as science and…

Computation and Language · Computer Science 2025-01-28 Ran Xu , Hui Liu , Sreyashi Nag , Zhenwei Dai , Yaochen Xie , Xianfeng Tang , Chen Luo , Yang Li , Joyce C. Ho , Carl Yang , Qi He

Retrieval-augmented generation (RAG) enhances large language models (LLMs) by incorporating additional information from retrieval. However, studies have shown that LLMs still face challenges in effectively using the retrieved information,…

Computation and Language · Computer Science 2024-06-13 Shicheng Xu , Liang Pang , Mo Yu , Fandong Meng , Huawei Shen , Xueqi Cheng , Jie Zhou

Retrieval-Augmented Generation (RAG) has become a standard approach for enhancing large language models (LLMs) with external knowledge, mitigating hallucinations, and improving factuality. However, existing systems rely on generating…

Computation and Language · Computer Science 2026-05-08 Ha Lan N. T , Minh-Anh Nguyen , Dung D. Le

Long-Context Question Answering (LCQA), a challenging task, aims to reason over long-context documents to yield accurate answers to questions. Existing long-context Large Language Models (LLMs) for LCQA often struggle with the "lost in the…

Computation and Language · Computer Science 2024-11-04 Qingfei Zhao , Ruobing Wang , Yukuo Cen , Daren Zha , Shicheng Tan , Yuxiao Dong , Jie Tang

While RAG demonstrates remarkable capabilities in LLM applications, its effectiveness is hindered by the ever-increasing length of retrieved contexts, which introduces information redundancy and substantial computational overhead. Existing…

Computation and Language · Computer Science 2025-10-28 Yixiong Fang , Tianran Sun , Yuling Shi , Xiaodong Gu

Recent advancements in Retrieval-Augmented Generation (RAG) have revolutionized natural language processing by integrating Large Language Models (LLMs) with external information retrieval, enabling accurate, up-to-date, and verifiable text…

Computation and Language · Computer Science 2025-04-22 Aoran Gan , Hao Yu , Kai Zhang , Qi Liu , Wenyu Yan , Zhenya Huang , Shiwei Tong , Guoping Hu

With context windows of millions of tokens, Long-Context Language Models (LCLMs) can encode entire document collections, offering a strong alternative to conventional retrieval-augmented generation (RAG). However, it remains unclear whether…

Computation and Language · Computer Science 2026-01-27 Francesco Maria Molfese , Momchil Hardalov , Rexhina Blloshmi , Bill Byrne , Adrià de Gispert

Large language models (LLMs) have recently become the leading source of answers for users' questions online. Despite their ability to offer eloquent answers, their accuracy and reliability can pose a significant challenge. This is…

Computation and Language · Computer Science 2024-07-09 Bojana Bašaragin , Adela Ljajić , Darija Medvecki , Lorenzo Cassano , Miloš Košprdić , Nikola Milošević

Retrieval-augmented generation (RAG) systems have been widely adopted in contemporary large language models (LLMs) due to their ability to improve generation quality while reducing the required input context length. In this work, we focus…

Computation and Language · Computer Science 2026-04-07 Tianyi Zhang , Andreas Marfurt

Large Language Models (LLMs) show potential for medical applications but often lack specialized clinical knowledge. Retrieval Augmented Generation (RAG) allows customization with domain-specific information, making it suitable for…

Despite the significant progress of large language models (LLMs) in various tasks, they often produce factual errors due to their limited internal knowledge. Retrieval-Augmented Generation (RAG), which enhances LLMs with external knowledge…

Computation and Language · Computer Science 2024-10-10 Yuanjie Lyu , Zihan Niu , Zheyong Xie , Chao Zhang , Tong Xu , Yang Wang , Enhong Chen