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Aligning large language models (LLMs) with human preferences is a critical challenge in AI research. While methods like Reinforcement Learning from Human Feedback (RLHF) and Direct Preference Optimization (DPO) are widely used, they often…

Computation and Language · Computer Science 2026-05-19 Xuan Qi , Rongwu Xu , Zhijing Jin

Aligning large language models with multiple human expectations and values is crucial for ensuring that they adequately serve a variety of user needs. To this end, offline multiobjective alignment algorithms such as the Rewards-in-Context…

Machine Learning · Computer Science 2026-01-01 Haoran Gu , Handing Wang , Yi Mei , Mengjie Zhang , Yaochu Jin

Advancements in Natural Language Processing (NLP), have led to the emergence of Large Language Models (LLMs) such as GPT, Llama, Claude, and Gemini, which excel across a range of tasks but require extensive fine-tuning to align their…

Computation and Language · Computer Science 2025-04-01 Angela Lopez-Cardona , Carlos Segura , Alexandros Karatzoglou , Sergi Abadal , Ioannis Arapakis

Reinforcement Learning from Human Feedback (RLHF) is increasingly used to align large language models (LLMs) with human preferences. However, the effectiveness of RLHF in addressing underlying biases remains unclear. This study investigates…

Computation and Language · Computer Science 2025-03-13 Logan Barnhart , Reza Akbarian Bafghi , Stephen Becker , Maziar Raissi

Reinforcement learning from human feedback (RLHF) has become a cornerstone of the training and alignment pipeline for large language models (LLMs). Recent advances, such as direct preference optimization (DPO), have simplified the…

Artificial Intelligence · Computer Science 2025-03-31 Syrine Belakaria , Joshua Kazdan , Charles Marx , Chris Cundy , Willie Neiswanger , Sanmi Koyejo , Barbara E. Engelhardt , Stefano Ermon

Reinforcement Learning with Human Feedback (RLHF) is the key to the success of large language models (LLMs) in recent years. In this work, we first introduce the concepts of knowledge breadth and knowledge depth, which measure the…

Computation and Language · Computer Science 2025-02-21 Sizhe Wang , Yongqi Tong , Hengyuan Zhang , Dawei Li , Xin Zhang , Tianlong Chen

Reinforcement Learning frameworks, particularly those utilizing human annotations, have become an increasingly popular method for preference fine-tuning, where the outputs of a language model are tuned to match a certain set of behavioral…

Machine Learning · Computer Science 2025-10-21 Archie Chaudhury

Large Language Models (LLMs) have revolutionized artificial intelligence with capabilities in reasoning, coding, and communication, driving innovation across industries. Their true potential depends on effective alignment to ensure correct,…

Computation and Language · Computer Science 2025-07-25 Bowen Jin , Jinsung Yoon , Zhen Qin , Ziqi Wang , Wei Xiong , Yu Meng , Jiawei Han , Sercan O. Arik

Large language models (LLMs) have become increasingly central to AI applications worldwide, necessitating robust multilingual safety alignment to ensure secure deployment across diverse linguistic contexts. Existing preference learning…

Computation and Language · Computer Science 2025-05-23 Weixiang Zhao , Yulin Hu , Yang Deng , Tongtong Wu , Wenxuan Zhang , Jiahe Guo , An Zhang , Yanyan Zhao , Bing Qin , Tat-Seng Chua , Ting Liu

We study the problem of aligning large language models (LLMs) with human preference data. Contrastive preference optimization has shown promising results in aligning LLMs with available preference data by optimizing the implicit reward…

Machine Learning · Computer Science 2024-12-20 Teng Xiao , Yige Yuan , Huaisheng Zhu , Mingxiao Li , Vasant G Honavar

ChatGLM is a free-to-use AI service powered by the ChatGLM family of large language models (LLMs). In this paper, we present the ChatGLM-RLHF pipeline -- a reinforcement learning from human feedback (RLHF) system -- designed to enhance…

Computation and Language · Computer Science 2024-04-04 Zhenyu Hou , Yilin Niu , Zhengxiao Du , Xiaohan Zhang , Xiao Liu , Aohan Zeng , Qinkai Zheng , Minlie Huang , Hongning Wang , Jie Tang , Yuxiao Dong

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

Large Language Models (LLMs) often exhibit implicit biases and discriminatory tendencies that reflect underlying social stereotypes. While recent alignment techniques such as RLHF and DPO have mitigated some of these issues, they remain…

Computation and Language · Computer Science 2025-11-11 Deng Yixuan , Ji Xiaoqiang

Learning Path Recommendation (LPR) aims to generate personalized sequences of learning items that maximize long-term learning effect while respecting pedagogical principles and operational constraints. Although large language models (LLMs)…

Artificial Intelligence · Computer Science 2026-01-22 Shuai Wang , Yaoming Yang , Bingdong Li , Hao Hao , Aimin Zhou

As Large Language Models (LLMs) are increasingly deployed in real-world applications, balancing helpfulness and safety has become a central challenge. A natural approach is to incorporate safety constraints into Reinforcement Learning from…

Machine Learning · Computer Science 2026-03-05 Geon-Hyeong Kim , Yu Jin Kim , Byoungjip Kim , Honglak Lee , Kyunghoon Bae , Youngsoo Jang , Moontae Lee

Preference alignment is pivotal for empowering large language models (LLMs) to generate helpful and harmless responses. However, the performance of preference alignment is highly sensitive to the prevalent noise in the preference data.…

Machine Learning · Computer Science 2024-05-29 Xize Liang , Chao Chen , Shuang Qiu , Jie Wang , Yue Wu , Zhihang Fu , Zhihao Shi , Feng Wu , Jieping Ye

DPO has become a widely adopted alternative to RLHF for aligning LLMs with human preferences, eliminating the need for a separate reward model or RL loop. Recent theoretical analysis uncovers an asymmetric gradient behavior in DPO: the loss…

Computation and Language · Computer Science 2026-05-28 Shaolong Chen , Madalina Ciobanu , Qingqing Mao , Ritankar Das

Reinforcement learning from human feedback (RLHF) is a crucial technique in aligning large language models (LLMs) with human preferences, ensuring these LLMs behave in beneficial and comprehensible ways to users. However, a longstanding…

Artificial Intelligence · Computer Science 2024-03-27 Feiteng Fang , Liang Zhu , Min Yang , Xi Feng , Jinchang Hou , Qixuan Zhao , Chengming Li , Xiping Hu , Ruifeng Xu

Many modern deep learning applications require balancing multiple objectives that are often conflicting. Examples include multi-task learning, fairness-aware learning, and the alignment of Large Language Models (LLMs). This leads to…

Machine Learning · Computer Science 2025-08-07 Weiyu Chen , Baijiong Lin , Xiaoyuan Zhang , Xi Lin , Han Zhao , Qingfu Zhang , James T. Kwok

Reinforcement learning from human feedback (RLHF) has emerged as the primary method for aligning large language models (LLMs) with human preferences. The RLHF process typically starts by training a reward model (RM) using human preference…

Machine Learning · Computer Science 2024-06-19 Haoxiang Wang , Wei Xiong , Tengyang Xie , Han Zhao , Tong Zhang