Finetune-RAG: Fine-Tuning Language Models to Resist Hallucination in Retrieval-Augmented Generation
On the map: Retrieval-augmented generation → RAG robustness and adaptive retrieval
Abstract (arXiv)
Retrieval-Augmented Generation (RAG) has emerged as a powerful framework to improve factuality in large language models (LLMs) by grounding their outputs in retrieved documents. However, ensuring perfect retrieval of relevant information remains challenging, and when irrelevant content is passed downstream to an LLM, it can lead to hallucinations. In this work, we propose Finetune-RAG, a simple and effective fine-tuning approach that features the first-of-its-kind RAG training dataset constructed to mimic real-world imperfections. Experimental results show that Finetune-RAG improves factual accuracy by 21.2% over the base model. We also propose Bench-RAG, an LLM-as-a-judge evaluation pipeline that stress tests models under realistic imperfect retrieval scenarios. Our codebase and dataset are fully open sourced for community use.
Key facts. Cited by 2 papers in the map (data through 7 Oct 2026). Placed in RAG robustness and adaptive retrieval, one of 15 directions in Retrieval-augmented generation. Builds on 28 of its 32 references that are in the map. First posted on arXiv 16 May 2025.
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- 2024Large Legal Fictions: Profiling Legal Hallucinations in Large Language Modelscited by 144
15 more
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- 2023The Troubling Emergence of Hallucination in Large Language Models -- An Extensive Definition, Quantification, and Prescriptive Remediationscited by 130
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- 2023On Learning to Summarize with Large Language Models as Referencescited by 80
- 2024StructRAG: Boosting Knowledge Intensive Reasoning of LLMs via Inference-time Hybrid Information Structurizationcited by 70
- 2024Do LLMs Know about Hallucination? An Empirical Investigation of LLM's Hidden Statescited by 50
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- 2023Deficiency of Large Language Models in Finance: An Empirical Examination of Hallucinationcited by 41
- 2025Multilingual Machine Translation with Open Large Language Models at Practical Scale: An Empirical Studycited by 38
- 2023Teaching Language Models to Hallucinate Less with Synthetic Taskscited by 31
- 2024MedHalu: Hallucinations in Responses to Healthcare Queries by Large Language Modelscited by 20
- 2025SRAG: Structured Retrieval-Augmented Generation for Multi-Entity Question Answering over Wikipedia Graphcited by 10
- 2023A Step Closer to Comprehensive Answers: Constrained Multi-Stage Question Decomposition with Large Language Modelscited by 4
- 2025OpenRAG: Optimizing RAG End-to-End via In-Context Retrieval Learningcited by 4
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Citing papers per year: 2026: 2.
2 papers.
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- 2024Enhancing LLM Factual Accuracy with RAG to Counter Hallucinations: A Case Study on Domain-Specific Queries in Private Knowledge-Bases
- 2026Tackling the Inherent Difficulty of Noise Filtering in RAG
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- 2025ConfRAG: Confidence-Guided Retrieval-Augmenting Generation
- 2025Towards Lighter and Robust Evaluation for Retrieval Augmented Generation