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Recent advances in large video-language models (VLMs) rely on extensive fine-tuning techniques that strengthen alignment between textual and visual comprehension. Leading pipelines typically pair supervised fine-tuning (SFT) with…

Computer Vision and Pattern Recognition · Computer Science 2025-10-06 Derek Shi , Ruben Glatt , Christine Klymko , Shubham Mohole , Hongjun Choi , Shashank Kushwaha , Sam Sakla , Felipe Leno da Silva

Reinforcement Learning from Human Feedback (RLHF) has enabled significant advancements within language modeling for powerful, instruction-following models. However, the alignment of these models remains a pressing challenge as the policy…

Machine Learning · Computer Science 2024-06-21 Ahmed M. Ahmed , Rafael Rafailov , Stepan Sharkov , Xuechen Li , Sanmi Koyejo

Building neural reward models from human preferences is a pivotal component in reinforcement learning from human feedback (RLHF) and large language model alignment research. Given the scarcity and high cost of human annotation, how to…

Computation and Language · Computer Science 2025-02-10 Yunyi Shen , Hao Sun , Jean-François Ton

Reinforcement learning from human feedback (RLHF) is a standard approach for fine-tuning large language models to follow instructions. As part of this process, learned reward models are used to approximately model human preferences.…

Machine Learning · Computer Science 2024-03-12 Thomas Coste , Usman Anwar , Robert Kirk , David Krueger

This paper addresses the challenge of aligning large language models (LLMs) with diverse human preferences within federated learning (FL) environments, where standard methods often fail to adequately represent diverse viewpoints. We…

Computation and Language · Computer Science 2025-12-17 Mahmoud Srewa , Tianyu Zhao , Salma Elmalaki

Reinforcement learning from human feedback usually models preferences using a reward function that does not distinguish between people. We argue that this is unlikely to be a good design choice in contexts with high potential for…

RLHF has emerged as a predominant approach for aligning artificial intelligence systems with human preferences, demonstrating exceptional and measurable efficacy in instruction following tasks; however, it exhibits insufficient compliance…

Artificial Intelligence · Computer Science 2025-05-20 Ruopei Sun , Jianfeng Cai , Jinhua Zhu , Kangwen Zhao , Dongyun Xue , Wengang Zhou , Li Li , Houqiang Li

Reinforcement Learning from Human Feedback (RLHF) is commonly utilized to improve the alignment of Large Language Models (LLMs) with human preferences. Given the evolving nature of human preferences, continual alignment becomes more crucial…

Machine Learning · Computer Science 2024-12-24 Han Zhang , Lin Gui , Yu Lei , Yuanzhao Zhai , Yehong Zhang , Yulan He , Hui Wang , Yue Yu , Kam-Fai Wong , Bin Liang , Ruifeng Xu

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

Conventional reinforcement learning (RL) ap proaches often struggle to learn effective policies under sparse reward conditions, necessitating the manual design of complex, task-specific reward functions. To address this limitation, rein…

Robotics · Computer Science 2025-12-15 Suzie Kim , Hye-Bin Shin , Seong-Whan Lee

In the context of reinforcement learning from human feedback (RLHF), the reward function is generally derived from maximum likelihood estimation of a random utility model based on pairwise comparisons made by humans. The problem of learning…

Computer Science and Game Theory · Computer Science 2024-11-08 Luise Ge , Daniel Halpern , Evi Micha , Ariel D. Procaccia , Itai Shapira , Yevgeniy Vorobeychik , Junlin Wu

Reinforcement Learning with Verifiable reward (RLVR) on preference data has become the mainstream approach for training Generative Reward Models (GRMs). Typically in pairwise rewarding tasks, GRMs generate reasoning chains ending with…

Computation and Language · Computer Science 2026-05-04 Zongqi Wang , Rui Wang , Yuchuan Wu , Yiyao Yu , Pinyi Zhang , Shaoning Sun , Yujiu Yang , Yongbin Li

As everyday use cases of large language model (LLM) AI assistants have expanded, it is becoming increasingly important to personalize responses to align to different users' preferences and goals. While reinforcement learning from human…

Machine Learning · Computer Science 2026-02-06 Hyunji Nam , Yanming Wan , Mickel Liu , Peter Ahnn , Jianxun Lian , Natasha Jaques

AI alignment in the shape of Reinforcement Learning from Human Feedback (RLHF) is increasingly treated as a crucial ingredient for high performance large language models. Proximal Policy Optimization (PPO) has been positioned by recent…

This work studies the alignment of large language models with preference data from an imitation learning perspective. We establish a close theoretical connection between reinforcement learning from human feedback RLHF and imitation learning…

Machine Learning · Computer Science 2025-03-10 Teng Xiao , Yige Yuan , Mingxiao Li , Zhengyu Chen , Vasant G Honavar

Objective speech quality measures are typically used to assess speech enhancement algorithms, but it has been shown that they are sub-optimal as learning objectives because they do not always align well with human subjective ratings. This…

Audio and Speech Processing · Electrical Eng. & Systems 2024-10-18 Anurag Kumar , Andrew Perrault , Donald S. Williamson

In this paper, we study reinforcement learning from human feedback (RLHF) under an episodic Markov decision process with a general trajectory-wise reward model. We developed a model-free RLHF best policy identification algorithm, called…

Machine Learning · Computer Science 2025-01-22 Qining Zhang , Honghao Wei , Lei Ying

Reward modeling represents a long-standing challenge in reinforcement learning from human feedback (RLHF) for aligning language models. Current reward modeling is heavily contingent upon experimental feedback data with high collection…

Computation and Language · Computer Science 2026-03-25 Hao Wang , Haocheng Yang , Licheng Pan , Lei Shen , Xiaoxi Li , Yinuo Wang , Zhichao Chen , Yuan Lu , Haoxuan Li , Zhouchen Lin

Reinforcement learning from human feedback (RLHF) has evolved to be one of the main methods for fine-tuning large language models (LLMs). However, existing RLHF methods are non-robust, and their performance deteriorates if the downstream…

Machine Learning · Computer Science 2025-03-04 Debmalya Mandal , Paulius Sasnauskas , Goran Radanovic

Existing approaches to language model alignment often treat safety as a tradeoff against helpfulness, which can lead to unacceptable responses in sensitive domains. To ensure reliable performance in such settings, we propose High-Confidence…

Machine Learning · Computer Science 2025-06-11 Yaswanth Chittepu , Blossom Metevier , Will Schwarzer , Austin Hoag , Scott Niekum , Philip S. Thomas