Challenge: Existing methods struggle to conduct deep searches and retrieve all necessary evidence.
Approach: They propose a benchmark for evaluating deep search, a retrieval-augmented generation that requires source-aware, multi-hop reasoning over diverse, sparsed, but related sources.
Outcome: The proposed benchmarks show that even the best-performing agentic RAG methods achieve an average performance score of 32.96 on the benchmark.

Similar Papers

Is Agentic RAG worth it? An experimental comparison of RAG approaches (2026.acl-industry)

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Challenge: Retrieval-Augmented Generation (RAG) systems have several limitations, including noisy or suboptimal retrieval, misuse of retrieval for out-of-scope queries, weak query–document matching, and variability or cost associated with the generator.
Approach: They propose to use a "Enhanced" RAG to address weaknesses in the workflow . they propose to orchestrate the entire process, deciding which actions to perform, when to perform them, and whether to iterate .
Outcome: The proposed models address shortcomings in the RAG workflow, and provide practical insights into the trade-offs between them.
Test-Time Strategies for More Efficient and Accurate Agentic RAG (2026.acl-srw)

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Challenge: Retrieval-Augmented Generation (RAG) systems face challenges with complex, multi-hop questions.
Approach: They propose to integrate contextualization module and de-duplication module to improve the accuracy of retrieved documents and to reduce the number of turns by 10.5%.
Outcome: The proposed approach achieves a 5.6% increase in EM score and reduces the average number of turns by 10.5% compared to the baseline.
DF-RAG: Query-Aware Diversity for Retrieval-Augmented Generation (2026.findings-eacl)

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Challenge: Retrieval-augmented generation (RAG) is a common technique for grounding language models in domain-specific information.
Approach: They propose a new retrieval technique that incorporates diversity into the retrieval step to improve performance on reasoning-intensive QA benchmarks.
Outcome: The proposed method outperforms baselines on reasoning-intensive QA benchmarks by 4–10%.
HASH-RAG: Bridging Deep Hashing with Retriever for Efficient, Fine Retrieval and Augmented Generation (2025.findings-acl)

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Challenge: Experimental evaluations on NQ, TriviaQA, and HotpotQA datasets demonstrate that our approach achieves a 90% reduction in retrieval time compared to conventional methods while maintaining considerate recall performance.
Approach: They propose a framework that integrates deep hashing techniques with systematic optimizations to address these limitations.
Outcome: The proposed framework outperforms retrieval/non-retrieval baselines by 1.4-4.3% in EM scores on NQ, TriviaQA, and HotpotQA datasets.
Open-RAG: Enhanced Retrieval Augmented Reasoning with Open-Source Large Language Models (2024.findings-emnlp)

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Challenge: Existing methods to integrate Large Language Models with external knowledge suffer from limited reasoning capabilities, especially when using open-source LLMs.
Approach: They propose a framework that transforms an arbitrary dense LLM into a parameter-efficient sparse mixture of experts (MoE) model capable of handling complex reasoning tasks.
Outcome: The proposed framework transforms an arbitrary dense LLM into a parameter-efficient sparse mixture of experts (MoE) model capable of handling complex reasoning tasks, including both single- and multi-hop queries.
A Survey of RAG-Reasoning Systems in Large Language Models (2025.findings-emnlp)

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Challenge: a survey of RAG-based reasoning-based approaches shows that it is not effective for multi-step inferences.
Approach: They map how advanced reasoning optimizes each stage of RAG . they show how retrieved knowledge supply missing premises and expand context for complex inference .
Outcome: The proposed frameworks achieve state-of-the-art across knowledge-intensive benchmarks.
Data-Centric Perspectives on Agentic Retrieval-Augmented Generation: A Survey (2026.findings-acl)

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Challenge: Large Language Models (LLMs) excel at natural language understanding and generation, yet rely on static pre-training data.
Approach: They propose to augment Large Language Models with external retrieval to ground model outputs . traditional RAG is constrained by a fixed retrieve-then-generate routine . authors aim to guide creation of high-quality datasets for next generation of adaptive LLM agents .
Outcome: The proposed model can decompose tasks, issue exploratory queries, and refine evidence through iterative retrieval.
Question Decomposition for Retrieval-Augmented Generation (2025.acl-srw)

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Challenge: Retrieval-augmented generation (RAG) is effective for question answering tasks . multi-hop questions, such as "Which company among NVIDIA, Apple, and Google made the biggest profit in 2023?" challenge RAG because relevant facts are often distributed across multiple documents .
Approach: They propose a pipeline that incorporates question decomposition to ground large language models in verifiable external sources.
Outcome: The proposed approach improves retrieval and answer accuracy over standard RAG . multi-hop questions often require multiple documents to support the model .
ViDoRe V3: A Comprehensive Evaluation of Retrieval Augmented Generation in Complex Real-World Scenarios (2026.acl-long)

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Challenge: Existing benchmarks focus on textual data, single-document comprehension, or evaluating retrieval and generation in isolation.
Approach: They propose a multimodal RAG benchmark featuring multi-type queries over visually rich document corpora.
Outcome: The proposed benchmark outperforms existing benchmarks in visual retrieval and human-verified queries.
T2-RAGBench: Text-and-Table Benchmark for Evaluating Retrieval-Augmented Generation (2026.eacl-long)

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Challenge: Existing QA datasets containing text-and-table data typically contain context-dependent questions, which may yield multiple correct answers depending on the provided context.
Approach: They propose a benchmark to evaluate RAG methods on text-and-table data.
Outcome: The proposed method evaluates RAG methods on real-world text-and-table data.

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