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Large language model (LLM) agents have evolved to intelligently process information, make decisions, and interact with users or tools. A key capability is the integration of long-term memory capabilities, enabling these agents to draw upon…

Computation and Language · Computer Science 2025-08-04 Rana Salama , Jason Cai , Michelle Yuan , Anna Currey , Monica Sunkara , Yi Zhang , Yassine Benajiba

Large language models (LLMs) are incredible and versatile tools for text-based tasks that have enabled countless, previously unimaginable, applications. Retrieval models, in contrast, have not yet seen such capable general-purpose models…

Information Retrieval · Computer Science 2025-09-10 Julian Killingback , Hamed Zamani

As LLMs exhibit a high degree of human-like capability, increasing attention has been paid to role-playing research areas in which responses generated by LLMs are expected to mimic human replies. This has promoted the exploration of…

Artificial Intelligence · Computer Science 2024-10-31 Le Huang , Hengzhi Lan , Zijun Sun , Chuan Shi , Ting Bai

In realistic retrieval settings with large and evolving knowledge bases, the total number of documents relevant to a query is typically unknown, and recall cannot be computed. In this paper, we evaluate several established strategies for…

Computation and Language · Computer Science 2026-05-08 Shelly Schwartz , Oleg Vasilyev , Randy Sawaya

External memory systems are pivotal for enabling Large Language Model (LLM) agents to maintain persistent knowledge and perform long-horizon decision-making. Existing paradigms typically follow a two-stage process: computationally expensive…

Machine Learning · Computer Science 2026-04-27 Xiucheng Xu , Bingbing Xu , Xueyun Tian , Zihe Huang , Rongxin Chen , Yunfan Li , Huawei Shen

The traditional RAG paradigm, which typically engages in the comprehension of relevant text chunks in response to received queries, inherently restricts both the depth of knowledge internalization and reasoning capabilities. To address this…

Computation and Language · Computer Science 2025-10-17 Jihao Zhao , Zhiyuan Ji , Simin Niu , Hanyu Wang , Feiyu Xiong , Zhiyu Li

Production AI agents frequently receive user-specific queries that are highly repetitive, with up to 47\% being semantically similar to prior interactions, yet each query is typically processed with the same computational cost. We argue…

Computation and Language · Computer Science 2026-03-25 Xunzhuo Liu , Bowei He , Xue Liu , Andy Luo , Haichen Zhang , Huamin Chen

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

As LLM-based agents are increasingly used in long-term interactions, cumulative memory is critical for enabling personalization and maintaining stylistic consistency. However, most existing systems adopt an ``all-or-nothing'' approach to…

Artificial Intelligence · Computer Science 2026-01-09 Muzhao Tian , Zisu Huang , Xiaohua Wang , Jingwen Xu , Zhengkang Guo , Qi Qian , Yuanzhe Shen , Kaitao Song , Jiakang Yuan , Changze Lv , Xiaoqing Zheng

Large Language Models (LLMs) have made significant progress in open-ended dialogue, yet their inability to retain and retrieve relevant information from long-term interactions limits their effectiveness in applications requiring sustained…

Large language model (LLM) agents extend generative models with reasoning, tool use, and persistent memory, thereby enabling the automation of complex tasks. In healthcare, such systems could support documentation, care coordination, and…

Artificial Intelligence · Computer Science 2026-03-24 Wenxian Yang , Hanzheng Qiu , Bangqun Zhang , Chengquan Li , Zhiyong Huang , Xiaobin Feng , Rongshan Yu , Jiahong Dong

Large language model (LLM) agents face fundamental limitations in long-horizon reasoning due to finite context windows, making effective memory management critical. Existing methods typically handle long-term memory (LTM) and short-term…

Computation and Language · Computer Science 2026-05-01 Yi Yu , Liuyi Yao , Yuexiang Xie , Qingquan Tan , Jiaqi Feng , Yaliang Li , Libing Wu

Retrieval is a widely adopted approach for improving language models leveraging external information. As the field moves towards multi-modal large language models, it is important to extend the pure text based methods to incorporate other…

Computation and Language · Computer Science 2024-06-17 Jari Kolehmainen , Aditya Gourav , Prashanth Gurunath Shivakumar , Yile Gu , Ankur Gandhe , Ariya Rastrow , Grant Strimel , Ivan Bulyko

Large language models (LLMs) have demonstrated strong capabilities in medical question answering; however, purely parametric models often suffer from knowledge gaps and limited factual grounding. Retrieval-augmented generation (RAG)…

Computation and Language · Computer Science 2026-04-09 Nusrat Sultana , Abdullah Muhammad Moosa , Kazi Afzalur Rahman , Sajal Chandra Banik

Agent memory systems accumulate experience but currently lack a principled operational metric for memory quality governance -- deciding which memories to trust, suppress, or deprecate as the agent's task distribution shifts. Write-time…

Artificial Intelligence · Computer Science 2026-04-15 Baris Simsek

Current AI agents excel in familiar settings, but fail sharply when faced with novel tasks with unseen vocabularies -- a core limitation of procedural memory systems. We present the first benchmark that isolates procedural memory retrieval…

Computation and Language · Computer Science 2025-12-01 Ishant Kohar , Aswanth Krishnan

Existing memory-augmented LLM agents often treat memory as a static repository with pre-defined representations and fixed retrieval pipelines, which is brittle in dynamic agentic environments where feedback, task variation, and…

While large language model (LLM) agents can effectively use external tools for complex real-world tasks, they require memory systems to leverage historical experiences. Current memory systems enable basic storage and retrieval but lack…

Computation and Language · Computer Science 2025-10-09 Wujiang Xu , Zujie Liang , Kai Mei , Hang Gao , Juntao Tan , Yongfeng Zhang

Large language models (LLMs) often require vast amounts of text to effectively acquire new knowledge. While continuing pre-training on large corpora or employing retrieval-augmented generation (RAG) has proven successful, updating an LLM…

Computation and Language · Computer Science 2025-08-11 Hugo Abonizio , Thales Almeida , Roberto Lotufo , Rodrigo Nogueira

Long-term memory is crucial for agents in specialized web environments, where success depends on recalling interface affordances, state dynamics, workflows, and recurring failure modes. However, existing memory benchmarks for agents mostly…

Computation and Language · Computer Science 2026-05-13 Di Wu , Zixiang Ji , Asmi Kawatkar , Bryan Kwan , Jia-Chen Gu , Nanyun Peng , Kai-Wei Chang