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Long-term conversational large language model (LLM) agents require memory systems that can recover relevant evidence from historical interactions without overwhelming the answer stage with irrelevant context. However, existing memory…

Computation and Language · Computer Science 2026-04-23 Shuqi Cao , Jingyi He , Fei Tan

Long-term conversational agents require effective memory management to handle dialogue histories that exceed the context window of large language models (LLMs). Existing methods based on fact extraction or summarization reduce redundancy…

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

Large language model (LLM) agents increasingly rely on external memory to support long-horizon interaction, personalized assistance, and multi-step reasoning. However, existing memory systems still face three core challenges: they often…

Computation and Language · Computer Science 2026-04-30 Shannan Yan , Jingchen Ni , Leqi Zheng , Jiajun Zhang , Peixi Wu , Dacheng Yin , Jing Lyu , Chun Yuan , Fengyun Rao

Memory systems often organize user-agent interactions as retrievable external memory and are crucial for long-running agents by overcoming the limited context windows of LLMs. However, existing memory systems invoke LLMs to process every…

Computation and Language · Computer Science 2026-05-18 Zijie Dai , Shiyuan Deng , Sheng Guan , Yizhou Tian , Xin Yao , Xiao Yan , James Cheng

This paper addresses the limitations of large language models in understanding long-term context. It proposes a model architecture equipped with a long-term memory mechanism to improve the retention and retrieval of semantic information…

Computation and Language · Computer Science 2025-05-30 Yue Xing , Tao Yang , Yijiashun Qi , Minggu Wei , Yu Cheng , Honghui Xin

Large language models still struggle with reliable long-term conversational memory: simply enlarging context windows or applying naive retrieval often introduces noise and destabilizes responses. We present APEX-MEM, a conversational memory…

Computation and Language · Computer Science 2026-04-17 Pratyay Banerjee , Masud Moshtaghi , Shivashankar Subramanian , Amita Misra , Ankit Chadha

Existing memory systems enable Large Language Models (LLMs) to support long-horizon human-LLM interactions by persisting historical interactions beyond limited context windows. However, while recent approaches have succeeded in constructing…

Computation and Language · Computer Science 2026-04-21 Haidong Xin , Xinze Li , Zhenghao Liu , Yukun Yan , Shuo Wang , Cheng Yang , Yu Gu , Ge Yu , Maosong Sun

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

Long-horizon interactive agents often accumulate large trajectory histories yet still fail to answer questions about earlier events reliably. We argue that the main bottleneck is not context length alone, but the trajectory-to-answer…

Computation and Language · Computer Science 2026-05-29 Encheng Su , Jinouwen Zhang , Jianyu Wu , Qiucheng Yu , Chen Tang , Pengze Li , Lintao Wang , Yizhou Wang , Xinzhu Ma , Shixiang Tang , Aoran Wang

Large language model-based agents operating in long-horizon interactions require memory systems that support temporal consistency, multi-hop reasoning, and evidence-grounded reuse across sessions. Existing approaches largely rely on…

Computation and Language · Computer Science 2026-01-27 Juexiang Ye , Xue Li , Xinyu Yang , Chengkai Huang , Lanshun Nie , Lina Yao , Dechen Zhan

When reading long-form text, human cognition is complex and structurized. While large language models (LLMs) process input contexts through a causal and sequential perspective, this approach can potentially limit their ability to handle…

Computation and Language · Computer Science 2024-11-01 Kai Liu , Zhihang Fu , Chao Chen , Wei Zhang , Rongxin Jiang , Fan Zhou , Yaowu Chen , Yue Wu , Jieping Ye

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

LLM-based conversational agents still struggle to maintain coherent, personalized interaction over many sessions: fixed context windows limit how much history can be kept in view, and most external memory approaches trade off between coarse…

Computation and Language · Computer Science 2025-12-12 Sizhe Zhou , Jiawei Han

Graph structures are increasingly used in dialog memory systems, but empirical findings on their effectiveness remain inconsistent, making it unclear which design choices truly matter. We present an experimental, system-oriented analysis of…

Computation and Language · Computer Science 2026-02-11 Sen Hu , Yuxiang Wei , Jiaxin Ran , Zhiyuan Yao , Xueran Han , Huacan Wang , Ronghao Chen , Lei Zou

Large Language Model (LLM) agents exhibit remarkable conversational and reasoning capabilities but remain constrained by limited context windows and the lack of persistent memory. Recent efforts address these limitations via external memory…

Information Retrieval · Computer Science 2026-01-07 Zhengjun Huang , Zhoujin Tian , Qintian Guo , Fangyuan Zhang , Yingli Zhou , Di Jiang , Zeying Xie , Xiaofang Zhou

Large language models (LLMs) deployed in user-facing applications require long-horizon consistency: the ability to remember prior interactions, respect user preferences, and ground reasoning in past events. However, contemporary memory…

Multiagent Systems · Computer Science 2026-02-04 Daivik Patel , Shrenik Patel

Large language model (LLM) agents require long-term memory to leverage information from past interactions. However, existing memory systems often face a fidelity--efficiency trade-off: raw dialogue histories are expensive, while flat facts…

Computation and Language · Computer Science 2026-05-26 Wentao Qiu , Haotian Hu , Fanyi Wang , Jinwei Kong , Yu Zhang

Persistent conversational AI systems face a choice between passing full conversation histories to a long-context large language model (LLM) and maintaining a dedicated memory system that extracts and retrieves structured facts. We compare a…

Computation and Language · Computer Science 2026-03-06 Natchanon Pollertlam , Witchayut Kornsuwannawit

Long-term conversational memory is a core capability for LLM-based dialogue systems, yet existing benchmarks and evaluation protocols primarily focus on surface-level factual recall. In realistic interactions, appropriate responses often…

Computation and Language · Computer Science 2026-02-12 Yifei Li , Weidong Guo , Lingling Zhang , Rongman Xu , Muye Huang , Hui Liu , Lijiao Xu , Yu Xu , Jun Liu

To enable reliable long-term interaction, LLM agents require a memory system that can faithfully store, efficiently retrieve, and deeply reason over accumulated dialogue history. Most existing methods adopt an extracted fact based paradigm:…

Computation and Language · Computer Science 2026-05-20 Jingwei Sun , Jianing Zhu , Jiangchao Yao , Tongliang Liu , Bo Han