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Existing evaluations of agents with memory typically assess memorization and action in isolation. One class of benchmarks evaluates memorization by testing recall of past conversations or text but fails to capture how memory is used to…

Computation and Language · Computer Science 2026-02-19 Zexue He , Yu Wang , Churan Zhi , Yuanzhe Hu , Tzu-Ping Chen , Lang Yin , Ze Chen , Tong Arthur Wu , Siru Ouyang , Zihan Wang , Jiaxin Pei , Julian McAuley , Yejin Choi , Alex Pentland

Reranking is a critical component in recommender systems, playing an essential role in refining the output of recommendation algorithms. Traditional reranking models have focused predominantly on accuracy, but modern applications demand…

Information Retrieval · Computer Science 2025-02-04 Jingtong Gao , Bo Chen , Weiwen Liu , Xiangyang Li , Yichao Wang , Wanyu Wang , Huifeng Guo , Ruiming Tang , Xiangyu Zhao

Recent advancements in Retrieval-Augmented Generation (RAG) have enabled Large Language Models to answer financial questions using external knowledge bases of U.S. SEC filings, earnings reports, and regulatory documents. However, existing…

The classical cascading pipeline of retrieve--rerank suffers from a bounded recall problem, stemming from limitations of the first-stage retriever. Most current approaches address the bounded recall problem by improving the first-stage…

Information Retrieval · Computer Science 2026-05-01 Mandeep Rathee , V Venktesh , Sean MacAvaney , Avishek Anand

The widely used retrieve-and-rerank pipeline faces two critical limitations: they are constrained by the initial retrieval quality of the top-k documents, and the growing computational demands of LLM-based rerankers restrict the number of…

Information Retrieval · Computer Science 2025-09-10 Haike Xu , Tong Chen

Real-world agents operate over long and evolving horizons, where information is repeatedly updated and may interfere across memories, requiring accurate recall and aggregated reasoning over multiple pieces of information. However, existing…

Computation and Language · Computer Science 2026-05-20 Hyunji Lee , Justin Chih-Yao Chen , Joykirat Singh , Zaid Khan , Elias Stengel-Eskin , Mohit Bansal

Processing long contexts presents a significant challenge for large language models (LLMs). While recent advancements allow LLMs to handle much longer contexts than before (e.g., 32K or 128K tokens), it is computationally expensive and can…

Computation and Language · Computer Science 2025-04-10 Hongjin Qian , Zheng Liu , Peitian Zhang , Kelong Mao , Defu Lian , Zhicheng Dou , Tiejun Huang

Pairing a lexical retriever with a neural re-ranking model has set state-of-the-art performance on large-scale information retrieval datasets. This pipeline covers scenarios like question answering or navigational queries, however, for…

Information Retrieval · Computer Science 2022-10-20 Tim Baumgärtner , Leonardo F. R. Ribeiro , Nils Reimers , Iryna Gurevych

The incorporation of memory into agents is essential for numerous tasks within the domain of Reinforcement Learning (RL). In particular, memory is paramount for tasks that require the use of past information, adaptation to novel…

Machine Learning · Computer Science 2026-03-05 Egor Cherepanov , Nikita Kachaev , Artem Zholus , Alexey K. Kovalev , Aleksandr I. Panov

Memory-augmented language agents are increasingly deployed in affective applications such as emotional support, where understanding and responding to users' latent emotional needs is critical. However, existing research often treats memory…

Computation and Language · Computer Science 2026-05-27 Xing Fu , Yulin Hu , Mengtong Ji , Haozhen Li , Yixin Sun , Weixiang Zhao , Yanyan Zhao , Bing Qin

Memory plays a pivotal role in enabling large language model~(LLM)-based agents to engage in complex and long-term interactions, such as question answering (QA) and dialogue systems. While various memory modules have been proposed for these…

Computation and Language · Computer Science 2024-12-23 Ruihong Zeng , Jinyuan Fang , Siwei Liu , Zaiqiao Meng

Large language model (LLM) agents are constrained by limited context windows, necessitating external memory systems for long-term information understanding. Current memory-augmented agents typically depend on pre-defined instructions and…

Computation and Language · Computer Science 2025-10-01 Yu Wang , Ryuichi Takanobu , Zhiqi Liang , Yuzhen Mao , Yuanzhe Hu , Julian McAuley , Xiaojian Wu

Large Language Models (LLMs) have transformed listwise document reranking by enabling global reasoning over candidate sets, yet single models often struggle to balance fine-grained relevance scoring with holistic cross-document analysis. We…

Computation and Language · Computer Science 2025-08-26 Abdelrahman Abdallah , Jamshid Mozafari , Bhawna Piryani , Adam Jatowt

Effective memory management is essential for large language model (LLM) agents handling long-term interactions. Current memory frameworks typically treat agents as passive "recorders" and retrieve information without understanding its…

Computation and Language · Computer Science 2026-03-03 Xiaohui Zhang , Zequn Sun , Chengyuan Yang , Yaqin Jin , Yazhong Zhang , Wei Hu

Large Language Models (LLMs) exhibit high reasoning capacity in medical question-answering, but their tendency to produce hallucinations and outdated knowledge poses critical risks in healthcare fields. While Retrieval-Augmented Generation…

Computation and Language · Computer Science 2026-03-25 Wenhao Wu , Zhentao Tang , Yafu Li , Shixiong Kai , Mingxuan Yuan , Chunlin Chen , Zhi Wang

Retrieval-Augmented Generation (RAG) systems typically face constraints because of their inherent mechanism: a simple top-k semantic search [1]. The approach often leads to the incorporation of irrelevant or redundant information in the…

Computation and Language · Computer Science 2025-09-03 Andreas Ottem

Retrieval-augmented generation (RAG) enhances large language models (LLMs) by incorporating external knowledge to generate a response within a context with improved accuracy and reduced hallucinations. However, multi-modal RAG systems face…

Machine Learning · Computer Science 2025-01-09 Matin Mortaheb , Mohammad A. Amir Khojastepour , Srimat T. Chakradhar , Sennur Ulukus

Existing works increasingly adopt memory-centric mechanisms to process long contexts in a segment manner, and effective memory management is one of the key capabilities that enables large language models to effectively propagate information…

Computation and Language · Computer Science 2026-01-27 Zecheng Tang , Baibei Ji , Ruoxi Sun , Haitian Wang , WangJie You , Zhang Yijun , Wenpeng Zhu , Ji Qi , Juntao Li , Min Zhang

Reasoning plays a crucial role in advancing Multimodal Large Language Models (MLLMs) toward Artificial General Intelligence. However, existing MLLM benchmarks often fall short in precisely and comprehensively evaluating long-chain reasoning…

Artificial Intelligence · Computer Science 2025-07-01 Huanjin Yao , Jiaxing Huang , Yawen Qiu , Michael K. Chen , Wenzheng Liu , Wei Zhang , Wenjie Zeng , Xikun Zhang , Jingyi Zhang , Yuxin Song , Wenhao Wu , Dacheng Tao

Despite the advantageous subquadratic complexity of modern recurrent deep learning models -- such as state-space models (SSMs) -- recent studies have highlighted their potential shortcomings compared to transformers on reasoning and…

Machine Learning · Computer Science 2025-10-13 Destiny Okpekpe , Antonio Orvieto