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Recent advances in Large Language Models (LLMs) have driven their adoption in recommender systems through Retrieval-Augmented Generation (RAG) frameworks. However, existing RAG approaches predominantly rely on flat, similarity-based…

Information Retrieval · Computer Science 2025-06-10 Vahid Azizi , Fatemeh Koochaki

Conventional recommender systems (RSs) face challenges in precisely capturing users' fine-grained preferences. Large language models (LLMs) have shown capabilities in commonsense reasoning and leveraging external tools that may help address…

Information Retrieval · Computer Science 2024-05-27 Yuyue Zhao , Jiancan Wu , Xiang Wang , Wei Tang , Dingxian Wang , Maarten de Rijke

Recently, large language models (LLMs) have been introduced into recommender systems (RSs), either to enhance traditional recommendation models (TRMs) or serve as recommendation backbones. However, existing LLM-based RSs often do not fully…

Information Retrieval · Computer Science 2025-05-27 Bowen Zheng , Xiaolei Wang , Enze Liu , Xi Wang , Lu Hongyu , Yu Chen , Wayne Xin Zhao , Ji-Rong Wen

While recent advancements in aligning Large Language Models (LLMs) with recommendation tasks have shown great potential and promising performance overall, these aligned recommendation LLMs still face challenges in complex scenarios. This is…

Information Retrieval · Computer Science 2025-02-18 Yi Fang , Wenjie Wang , Yang Zhang , Fengbin Zhu , Qifan Wang , Fuli Feng , Xiangnan He

Predicting a user's next search query from recent interaction behaviors is a critical problem in modern e-commerce systems, particularly in scenarios where user intent evolves rapidly. Large Language Models (LLMs) offer strong semantic…

Information Retrieval · Computer Science 2026-05-07 Bin Zhang , Weipeng Huang , Dimin Wang , Jialin Zhu , Yuning Jiang , Zhaode Wang , Chengfei Lv , Jian Wang , Qichao Ma , Li Chen , Junqing Wu , Yipeng Yu

Large language model (LLM)-based recommender models that bridge users and items through textual prompts for effective semantic reasoning have gained considerable attention. However, few methods consider the underlying rationales behind…

Computation and Language · Computer Science 2025-01-09 Xinfeng Wang , Jin Cui , Yoshimi Suzuki , Fumiyo Fukumoto

Intent-aware session recommendation (ISR) is pivotal in discerning user intents within sessions for precise predictions. Traditional approaches, however, face limitations due to their presumption of a uniform number of intents across all…

Computation and Language · Computer Science 2024-08-29 Zhu Sun , Hongyang Liu , Xinghua Qu , Kaidong Feng , Yan Wang , Yew-Soon Ong

Recommender Systems (RSs) have become the cornerstone of various applications such as e-commerce and social media platforms. The evolution of RSs is paramount in the digital era, in which personalised user experience is tailored to the…

Information Retrieval · Computer Science 2025-12-09 Tendai Mukande , Esraa Ali , Annalina Caputo , Ruihai Dong , Noel OConnor

The application of Large Language Models (LLMs) in recommender systems faces key challenges in delivering deep personalization and intelligent reasoning, especially for interactive scenarios. Current methods are often constrained by limited…

Information Retrieval · Computer Science 2025-10-17 Jiani Huang , Xingchen Zou , Lianghao Xia , Qing Li

Large Language Models (LLMs) have been integrated into recommendation systems to enhance user behavior comprehension. The Retrieval Augmented Generation (RAG) technique is further incorporated into these systems to retrieve more relevant…

Information Retrieval · Computer Science 2025-02-12 Jian Xu , Sichun Luo , Xiangyu Chen , Haoming Huang , Hanxu Hou , Linqi Song

Recently, sequential recommendation has been adapted to the LLM paradigm to enjoy the power of LLMs. LLM-based methods usually formulate recommendation information into natural language and the model is trained to predict the next item in…

Information Retrieval · Computer Science 2024-02-16 Hanbing Wang , Xiaorui Liu , Wenqi Fan , Xiangyu Zhao , Venkataramana Kini , Devendra Yadav , Fei Wang , Zhen Wen , Jiliang Tang , Hui Liu

Large language models (LLMs) have demonstrated prominent reasoning capabilities in recommendation tasks by transforming them into text-generation tasks. However, existing approaches either disregard or ineffectively model the user-item…

Information Retrieval · Computer Science 2024-11-19 Xinfeng Wang , Jin Cui , Fumiyo Fukumoto , Yoshimi Suzuki

When users are dissatisfied with recommendations from a recommender system, they often lack fine-grained controls for changing them. Large language models (LLMs) offer a solution by allowing users to guide their recommendations through…

Artificial Intelligence · Computer Science 2025-10-15 Micah Carroll , Adeline Foote , Kevin Feng , Marcus Williams , Anca Dragan , W. Bradley Knox , Smitha Milli

We propose Collab-REC, a multi-agent framework designed to counteract popularity bias and enhance diversity in tourism recommendations. In our setting, three LLM-based agents: Personalization, Popularity, and Sustainability, generate city…

Artificial Intelligence · Computer Science 2026-03-03 Ashmi Banerjee , Adithi Satish , Fitri Nur Aisyah , Wolfgang Wörndl , Yashar Deldjoo

Nowadays, Large Language Models (LLMs) have shown exceptional performance in sequential recommendations, and the adoption of LLM-based recommender systems (LLMRec) is becoming increasingly widespread in existing e-commerce platforms.…

Information Retrieval · Computer Science 2025-11-21 Hao Liu , Le Wu , Min Hou , Han Wu , Kun Zhang , Xin Li , Si Wei

Recently, large language models (LLMs) have shown great potential in recommender systems, either improving existing recommendation models or serving as the backbone. However, there exists a large semantic gap between LLMs and recommender…

Information Retrieval · Computer Science 2024-04-22 Bowen Zheng , Yupeng Hou , Hongyu Lu , Yu Chen , Wayne Xin Zhao , Ming Chen , Ji-Rong Wen

Large Language Models (LLMs) demonstrate human-like capabilities in language understanding, reasoning, and generation, driving interest in using LLM-based agents to simulate human feedback in recommender systems. However, most existing…

Information Retrieval · Computer Science 2025-09-23 Xinye Wanyan , Danula Hettiachchi , Chenglong Ma , Ziqi Xu , Jeffrey Chan

Recommendation systems are widely used in e-commerce websites and online platforms to address information overload. However, existing systems primarily rely on historical data and user feedback, making it difficult to capture user intent…

Information Retrieval · Computer Science 2024-02-22 Qian Zhao , Hao Qian , Ziqi Liu , Gong-Duo Zhang , Lihong Gu

Large Language Models (LLMs) have emerged as a new paradigm for recommendation by converting interacted item history into language modeling. However, constrained by the limited context length of LLMs, existing approaches have to truncate…

Information Retrieval · Computer Science 2025-05-20 Jiayi Liao , Ruobing Xie , Sihang Li , Xiang Wang , Xingwu Sun , Zhanhui Kang , Xiangnan He

Sequential recommendation aims to predict users' future interactions by modeling collaborative filtering (CF) signals from historical behaviors of similar users or items. Traditional sequential recommenders predominantly rely on ID-based…

Information Retrieval · Computer Science 2025-06-30 Yingzhi He , Xiaohao Liu , An Zhang , Yunshan Ma , Tat-Seng Chua