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Personalized alignment is crucial for enabling Large Language Models (LLMs) to engage effectively in user-centric interactions. However, current methods face a dual challenge: they fail to infer users' deep implicit preferences (including…

Artificial Intelligence · Computer Science 2026-04-29 Peiming Li , Zhiyuan Hu , Yang Tang , Shiyu Li , Xi Chen

Aligning large language models (LLMs) typically aim to reflect general human values and behaviors, but they often fail to capture the unique characteristics and preferences of individual users. To address this gap, we introduce the concept…

Computation and Language · Computer Science 2025-03-11 Minjun Zhu , Yixuan Weng , Linyi Yang , Yue Zhang

The future of conversational agents will provide users with personalized information responses. However, a significant challenge in developing models is the lack of large-scale dialogue datasets that span multiple sessions and reflect…

Information Retrieval · Computer Science 2024-05-07 Hideaki Joko , Shubham Chatterjee , Andrew Ramsay , Arjen P. de Vries , Jeff Dalton , Faegheh Hasibi

Preferences within a group of people are not uniform but follow a distribution. While existing alignment methods like Direct Preference Optimization (DPO) attempt to steer models to reflect human preferences, they struggle to capture the…

Computation and Language · Computer Science 2025-05-14 Binwei Yao , Zefan Cai , Yun-Shiuan Chuang , Shanglin Yang , Ming Jiang , Diyi Yang , Junjie Hu

Large language models (LLMs) are used to generate content for a wide range of tasks, and are set to reach a growing audience in coming years due to integration in product interfaces like ChatGPT or search engines like Bing. This intensifies…

Computation and Language · Computer Science 2023-03-10 Hannah Rose Kirk , Bertie Vidgen , Paul Röttger , Scott A. Hale

Inference-time alignment enables large language models (LLMs) to generate outputs aligned with end-user preferences without further training. Recent post-training methods achieve this by using small guidance models to modify token…

Artificial Intelligence · Computer Science 2025-11-14 Sarat Chandra Bobbili , Ujwal Dinesha , Dheeraj Narasimha , Srinivas Shakkottai

The advent of large language models (LLMs) has allowed numerous applications, including the generation of queried responses, to be leveraged in chatbots and other conversational assistants. Being trained on a plethora of data, LLMs often…

Computation and Language · Computer Science 2025-05-16 Deeksha Prahlad , Chanhee Lee , Dongha Kim , Hokeun Kim

Recently, the personalization of Large Language Models (LLMs) to generate content that aligns with individual user preferences has garnered widespread attention. Personalized Retrieval-Augmented Generation (RAG), which retrieves relevant…

Information Retrieval · Computer Science 2025-04-09 Teng Shi , Jun Xu , Xiao Zhang , Xiaoxue Zang , Kai Zheng , Yang Song , Han Li

Preference optimization is widely used to align Large Language Models (LLMs) with preference feedback. However, most existing methods train on a single positive-negative pair per prompt, discarding additional supervision available in…

Computation and Language · Computer Science 2026-04-20 Jixuan Leng , Si Si , Hsiang-Fu Yu , Vinod Raman , Inderjit S. Dhillon

Personalized alignment is essential for enabling large language models (LLMs) to engage effectively in user-centric dialogue. While recent prompt-based and offline optimization methods offer preliminary solutions, they fall short in…

Computation and Language · Computer Science 2025-12-12 Weixiang Zhao , Xingyu Sui , Yulin Hu , Jiahe Guo , Haixiao Liu , Biye Li , Yanyan Zhao , Bing Qin , Ting Liu

The holy grail of LLM personalization is a single LLM for each user, perfectly aligned with that user's preferences. However, maintaining a separate LLM per user is impractical due to constraints on compute, memory, and system complexity.…

Computation and Language · Computer Science 2026-04-13 Cheol Woo Kim , Jai Moondra , Roozbeh Nahavandi , Andrew Perrault , Milind Tambe , Swati Gupta

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

User preferences are increasingly used to personalize Large Language Model (LLM) responses, yet how to reliably leverage preference signals for answer generation remains under-explored. In practice, preferences can be noisy, incomplete, or…

Computation and Language · Computer Science 2026-04-09 Tianyu Zhao , Siqi Li , Yasser Shoukry , Salma Elmalaki

The deployment of Large Language Models (LLMs) in interactive systems necessitates a deep alignment with the nuanced and dynamic preferences of individual users. Current alignment techniques predominantly address universal human values or…

Computation and Language · Computer Science 2025-12-18 Xiaotian Zhang , Yuan Wang , Ruizhe Chen , Zeya Wang , Runchen Hou , Zuozhu Liu

Smart assistants increasingly act proactively, yet mistimed or intrusive behavior often causes users to lose trust and disable these features. Learning user preferences for proactive assistance is difficult because real-world studies are…

Human-Computer Interaction · Computer Science 2026-02-05 Ziyi Xuan , Yiwen Wu , Zhaoyang Yan , Vinod Namboodiri , Yu Yang

Aligning language models to human expectations, e.g., being helpful and harmless, has become a pressing challenge for large language models. A typical alignment procedure consists of supervised fine-tuning and preference learning. Most…

Machine Learning · Computer Science 2024-02-27 Tianchi Cai , Xierui Song , Jiyan Jiang , Fei Teng , Jinjie Gu , Guannan Zhang

Fine-grained control over large language models (LLMs) remains a significant challenge, hindering their adaptability to diverse user needs. While Reinforcement Learning from Human Feedback (RLHF) shows promise in aligning LLMs, its reliance…

Machine Learning · Computer Science 2024-03-07 Haoxiang Wang , Yong Lin , Wei Xiong , Rui Yang , Shizhe Diao , Shuang Qiu , Han Zhao , Tong Zhang

Large language models (LLMs) are typically aligned with population-level preferences, despite substantial variation across individual users. We introduce POPI, a user-level personalization framework that separates the problem into two…

Computation and Language · Computer Science 2026-04-28 Yizhuo Chen , Xin Liu , Ruijie Wang , Zheng Li , Pei Chen , Changlong Yu , Qingyu Yin , Priyanka Nigam , Meng Jiang , Bing Yin

Despite substantial advances in large language models (LLMs), generating factually consistent responses for knowledge-intensive question answering remains challenging. These difficulties are primarily due to hallucinations and the…

Computation and Language · Computer Science 2026-05-19 Taolin Zhang , Dongyang Li , Chen Chen , Qizhou Chen , Jiuheng Wan , Xiaofeng He , Chengyu Wang , Richang Hong

The success of AI assistants based on language models (LLMs) hinges crucially on Reinforcement Learning from Human Feedback (RLHF), which enables the generation of responses more aligned with human preferences. As universal AI assistants,…

Machine Learning · Computer Science 2023-12-27 Rui Zheng , Wei Shen , Yuan Hua , Wenbin Lai , Shihan Dou , Yuhao Zhou , Zhiheng Xi , Xiao Wang , Haoran Huang , Tao Gui , Qi Zhang , Xuanjing Huang