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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

Sequential recommendation (SR) aims to capture users' dynamic interests and sequential patterns based on their historical interactions. Recently, the powerful capabilities of large language models (LLMs) have driven their adoption in SR.…

Information Retrieval · Computer Science 2025-09-03 Yuhao Wang , Junwei Pan , Xinhang Li , Maolin Wang , Yuan Wang , Yue Liu , Dapeng Liu , Jie Jiang , Xiangyu Zhao

Large Language Models (LLMs) have recently emerged as promising tools for recommendation thanks to their advanced textual understanding ability and context-awareness. Despite the current practice of training and evaluating LLM-based…

Information Retrieval · Computer Science 2025-06-12 Sein Kim , Hongseok Kang , Kibum Kim , Jiwan Kim , Donghyun Kim , Minchul Yang , Kwangjin Oh , Julian McAuley , Chanyoung Park

Recommender systems have seen significant advancements with the influence of deep learning and graph neural networks, particularly in capturing complex user-item relationships. However, these graph-based recommenders heavily depend on…

Information Retrieval · Computer Science 2024-12-12 Xubin Ren , Wei Wei , Lianghao Xia , Lixin Su , Suqi Cheng , Junfeng Wang , Dawei Yin , Chao Huang

Harnessing Large Language Models (LLMs) for recommendation is rapidly emerging, which relies on two fundamental steps to bridge the recommendation item space and the language space: 1) item indexing utilizes identifiers to represent items…

Information Retrieval · Computer Science 2024-07-26 Xinyu Lin , Wenjie Wang , Yongqi Li , Fuli Feng , See-Kiong Ng , Tat-Seng Chua

Semantic ID-based generative recommendation represents items as sequences of discrete tokens, but it inherently faces a trade-off between representational expressiveness and computational efficiency. Residual Quantization (RQ)-based…

Information Retrieval · Computer Science 2026-02-17 Ming Xia , Zhiqin Zhou , Guoxin Ma , Dongmin Huang

This paper explores the use of Large Language Models (LLMs) for sequential recommendation, which predicts users' future interactions based on their past behavior. We introduce a new concept, "Integrating Recommendation Systems as a New…

Information Retrieval · Computer Science 2024-12-24 Kai Zheng , Qingfeng Sun , Can Xu , Peng Yu , Qingwei Guo

Semantic identifiers (IDs) have proven effective in adapting large language models for generative recommendation and retrieval. However, existing methods often suffer from semantic ID conflicts, where semantically similar documents (or…

Information Retrieval · Computer Science 2025-09-23 Ruohan Zhang , Jiacheng Li , Julian McAuley , Yupeng Hou

Existing sequential recommendation models, even advanced diffusion-based approaches, often struggle to capture the rich semantic intent underlying user behavior, especially for new users or long-tail items. This limitation stems from their…

Information Retrieval · Computer Science 2026-01-08 Bo-Chian Chen , Manel Slokom

Generative recommendation systems, driven by large language models (LLMs), present an innovative approach to predicting user preferences by modeling items as token sequences and generating recommendations in a generative manner. A critical…

Generative recommendation is emerging as a powerful paradigm that directly generates item predictions, moving beyond traditional matching-based approaches. However, current methods face two key challenges: token-item misalignment, where…

Information Retrieval · Computer Science 2025-06-24 Chang Liu , Yimeng Bai , Xiaoyan Zhao , Yang Zhang , Fuli Feng , Wenge Rong

Semantic ID (SID)-based recommendation is a promising paradigm for scaling sequential recommender systems, but existing methods largely follow a semantic-centric pipeline: item embeddings are learned from foundation models and discretized…

Information Retrieval · Computer Science 2026-02-03 Yu Liang , Zhongjin Zhang , Yuxuan Zhu , Kerui Zhang , Zhiluohan Guo , Wenhang Zhou , Zonqi Yang , Kangle Wu , Yabo Ni , Anxiang Zeng , Cong Fu , Jianxin Wang , Jiazhi Xia

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

Sequential recommendation is an important recommendation task that aims to predict the next item in a sequence. Recently, adaptations of language models, particularly Transformer-based models such as SASRec and BERT4Rec, have achieved…

Information Retrieval · Computer Science 2023-06-21 Aleksandr V. Petrov , Craig Macdonald

Session-based recommendation (SR) models aim to recommend items to anonymous users based on their behavior during the current session. While various SR models in the literature utilize item sequences to predict the next item, they often…

Information Retrieval · Computer Science 2025-08-29 Jyoti Narwariya , Priyanka Gupta , Muskan Gupta , Jyotsana Khatri , Lovekesh Vig

Large Language Models (LLMs) are increasingly prominent in the recommendation systems domain. Existing studies usually utilize in-context learning or supervised fine-tuning on task-specific data to align LLMs into recommendations. However,…

Information Retrieval · Computer Science 2024-06-21 Zhong Guan , Likang Wu , Hongke Zhao , Ming He , Jianpin Fan

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

Generative recommendation models sequence generation to produce items end-to-end, but training from behavioral logs often provides weak supervision on underlying user intent. Although Large Language Models (LLMs) offer rich semantic priors…

Information Retrieval · Computer Science 2026-02-26 Jie Jiang , Hongbo Tang , Wenjie Wu , Yangru Huang , Zhenmao Li , Qian Li , Changping Wang , Jun Zhang , Huan Yu

In recent years, large language models (LLM) have emerged as powerful tools for diverse natural language processing tasks. However, their potential for recommender systems under the generative recommendation paradigm remains relatively…

Information Retrieval · Computer Science 2023-07-11 Jianchao Ji , Zelong Li , Shuyuan Xu , Wenyue Hua , Yingqiang Ge , Juntao Tan , Yongfeng Zhang

The widespread adoption of Large Language Models (LLMs) as re-rankers is shifting recommender systems towards a user-centric paradigm. However, a significant gap remains: current re-rankers often lack mechanisms for fine-grained user…

Information Retrieval · Computer Science 2025-11-25 Wenxi Dai , Wujiang Xu , Pinhuan Wang , Dimitris N. Metaxas