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Graph retrieval-augmented generation (GraphRAG) has emerged as a powerful paradigm for enhancing large language models (LLMs) with external knowledge. It leverages graphs to model the hierarchical structure between specific concepts,…

Computation and Language · Computer Science 2026-02-24 Zhishang Xiang , Chuanjie Wu , Qinggang Zhang , Shengyuan Chen , Zijin Hong , Xiao Huang , Jinsong Su

Modern LLM deployments confront a widening cost-performance spectrum: premium models deliver strong reasoning but are expensive, while lightweight models are economical yet brittle on complex tasks. Static escalation rules and keyword…

Retrieval-Augmented Generation (RAG) improves large language models (LLMs) by retrieving relevant information from external sources and has been widely adopted for text-based tasks. For structured data, such as knowledge graphs, Graph…

Information Retrieval · Computer Science 2026-03-05 Haoyu Han , Li Ma , Yu Wang , Harry Shomer , Yongjia Lei , Zhisheng Qi , Kai Guo , Zhigang Hua , Bo Long , Hui Liu , Charu C. Aggarwal , Jiliang Tang

Despite the remarkable progress of Large Language Models (LLMs), their performance in question answering (QA) remains limited by the lack of domain-specific and up-to-date knowledge. Retrieval-Augmented Generation (RAG) addresses this…

Information Retrieval · Computer Science 2025-09-17 Yaodong Su , Yixiang Fang , Yingli Zhou , Quanqing Xu , Chuanhui Yang

Retrieval-Augmented Generation (RAG) has significantly mitigated the hallucinations of Large Language Models (LLMs) by grounding the generation with external knowledge. Recent extensions of RAG to graph-based retrieval offer a promising…

Machine Learning · Computer Science 2025-09-23 Jialin Chen , Houyu Zhang , Seongjun Yun , Alejandro Mottini , Rex Ying , Xiang Song , Vassilis N. Ioannidis , Zheng Li , Qingjun Cui

Graph Retrieval-Augmented Generation (Graph-RAG) enhances multihop question answering by organizing corpora into knowledge graphs and routing evidence through relational structure. However, practical deployments face two persistent…

Information Retrieval · Computer Science 2026-01-30 Jiate Liu , Zebin Chen , Shaobo Qiao , Mingchen Ju , Danting Zhang , Bocheng Han , Shuyue Yu , Xin Shu , Jingling Wu , Dong Wen , Xin Cao , Guanfeng Liu , Zhengyi Yang

Graph-based retrieval-augmented generation (GraphRAG) exploits structured knowledge to support knowledge-intensive reasoning. However, most existing methods treat graphs as intermediate artifacts, and the few subgraph-based retrieval…

Information Retrieval · Computer Science 2026-03-10 Haonan Yuan , Qingyun Sun , Junhua Shi , Mingjun Liu , Jiaqi Yuan , Ziwei Zhang , Xingcheng Fu , Jianxin Li

Large Language Models (LLMs) demonstrate strong reasoning abilities but face limitations such as hallucinations and outdated knowledge. Knowledge Graph (KG)-based Retrieval-Augmented Generation (RAG) addresses these issues by grounding LLM…

Computation and Language · Computer Science 2025-03-04 Mufei Li , Siqi Miao , Pan Li

Graph Retrieval-Augmented Generation (GraphRAG) enhances factual reasoning in LLMs by structurally modeling knowledge through graph-based representations. However, existing GraphRAG approaches face two core limitations: shallow retrieval…

Computation and Language · Computer Science 2025-10-01 Cehao Yang , Xiaojun Wu , Xueyuan Lin , Chengjin Xu , Xuhui Jiang , Yuanliang Sun , Jia Li , Hui Xiong , Jian Guo

Graph-based retrieval-augmented generation (RAG) enriches large language models (LLMs) with external knowledge for long-context understanding and multi-hop reasoning, but existing methods face a granularity dilemma: fine-grained…

Computation and Language · Computer Science 2025-09-26 Yaxiong Wu , Jianyuan Bo , Yongyue Zhang , Sheng Liang , Yong Liu

Conventional Retrieval Augmented Generation (RAG) approaches are common in text-based applications. However, they struggle with structured, interconnected datasets like knowledge graphs, where understanding underlying relationships is…

Information Retrieval · Computer Science 2025-07-15 Savini Kashmira , Jayanaka L. Dantanarayana , Krisztián Flautner , Lingjia Tang , Jason Mars

Retrieval-Augmented Generation (RAG) is widely used to mitigate hallucinations of Large Language Models (LLMs) by leveraging external knowledge. While effective for simple queries, traditional RAG systems struggle with large-scale,…

Computation and Language · Computer Science 2025-11-11 Luyao Zhuang , Shengyuan Chen , Yilin Xiao , Huachi Zhou , Yujing Zhang , Hao Chen , Qinggang Zhang , Xiao Huang

Graph Retrieval-Augmented Generation (GraphRAG) is dominated by a retrieve-then-reason paradigm, where context is retrieved using heuristics and then reasoned over. Such methods struggle to adapt to the query-specific logic required for…

Information Retrieval · Computer Science 2026-05-20 Larnell Moore , Naihao Deng , Rada Mihalcea , Farnaz Jahanbakhsh

Large language models have shown remarkable language processing and reasoning ability but are prone to hallucinate when asked about private data. Retrieval-augmented generation (RAG) retrieves relevant data that fit into an LLM's context…

Machine Learning · Computer Science 2025-11-13 Alfred Clemedtson , Borun Shi

GraphRAG integrates (knowledge) graphs with large language models (LLMs) to improve reasoning accuracy and contextual relevance. Despite its promising applications and strong relevance to multiple research communities, such as databases and…

Artificial Intelligence · Computer Science 2025-08-20 Yukun Cao , Zengyi Gao , Zhiyang Li , Xike Xie , S. Kevin Zhou , Jianliang Xu

Large language models (LLMs) achieve remarkable performance across domains but remain prone to hallucinations and inconsistencies. Retrieval-augmented generation (RAG) mitigates these issues by augmenting model inputs with relevant…

Machine Learning · Computer Science 2026-04-10 Akash Dhasade , Rachid Guerraoui , Anne-Marie Kermarrec , Diana Petrescu , Rafael Pires , Mathis Randl , Martijn de Vos

Retrieval-augmented generation (RAG) improves the response quality of large language models (LLMs) by retrieving knowledge from external databases. Typical RAG approaches split the text database into chunks, organizing them in a flat…

Computation and Language · Computer Science 2025-11-18 Boyu Chen , Zirui Guo , Zidan Yang , Yuluo Chen , Junze Chen , Zhenghao Liu , Chuan Shi , Cheng Yang

Recent literature highlights the potential of graph-based approaches within large language model (LLM) retrieval-augmented generation (RAG) pipelines for answering queries of varying complexity, particularly those that fall outside the…

Information Retrieval · Computer Science 2026-04-24 Isabela Iacob , Melisa Marian , Gheorghe Cosmin Silaghi

Retrieval-augmented generation (RAG) is a powerful technique that enhances downstream task execution by retrieving additional information, such as knowledge, skills, and tools from external sources. Graph, by its intrinsic "nodes connected…

Large Language Models (LLMs) have achieved impressive capabilities in language understanding and generation, yet they continue to underperform on knowledge-intensive reasoning tasks due to limited access to structured context and multi-hop…

Computation and Language · Computer Science 2025-06-26 Travis Thompson , Seung-Hwan Lim , Paul Liu , Ruoying He , Dongkuan Xu