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Large Language Models (LLMs) have exhibited remarkable performance across a wide range of domains, motivating research into their potential for recommendation systems. Early efforts have leveraged LLMs' rich knowledge and strong…

信息检索 · 计算机科学 2025-04-03 Chao Sun , Yaobo Liang , Yaming Yang , Shilin Xu , Tianmeng Yang , Yunhai Tong

We present a fine-grained theoretical analysis of the performance gap between two-stage reinforcement learning from human feedback~(RLHF) and direct preference optimization~(DPO). Our study decomposes this gap into two sources: the explicit…

机器学习 · 计算机科学 2026-05-13 Ruizhe Shi , Minhak Song , Runlong Zhou , Zihan Zhang , Maryam Fazel , Simon S. Du

Large Language Models (LLMs) have become pivotal in advancing natural language processing, yet their potential to perpetuate biases poses significant concerns. This paper introduces a new framework employing Direct Preference Optimization…

计算与语言 · 计算机科学 2024-07-22 Ahmed Allam

Effective training of language models (LMs) for mathematical reasoning tasks demands high-quality supervised fine-tuning data. Besides obtaining annotations from human experts, a common alternative is sampling from larger and more powerful…

计算与语言 · 计算机科学 2024-07-26 Tianduo Wang , Shichen Li , Wei Lu

In the post-training of large language models (LLMs), Reinforcement Learning from Human Feedback (RLHF) is an effective approach to achieve generation aligned with human preferences. Direct Preference Optimization (DPO) allows for policy…

机器学习 · 计算机科学 2025-06-16 Motoki Omura , Yasuhiro Fujita , Toshiki Kataoka

Reward inference (learning a reward model from human preferences) is a critical intermediate step in the Reinforcement Learning from Human Feedback (RLHF) pipeline for fine-tuning Large Language Models (LLMs). In practice, RLHF faces…

机器学习 · 计算机科学 2025-03-04 Qining Zhang , Lei Ying

Direct Preference Optimization (DPO) has emerged as a de-facto approach for aligning language models with human preferences. Recent work has shown DPO's effectiveness relies on training data quality. In particular, clear quality differences…

机器学习 · 计算机科学 2025-01-28 Nirav Diwan , Tolga Ergen , Dongsub Shim , Honglak Lee

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…

计算与语言 · 计算机科学 2026-03-25 Hao Wang , Haocheng Yang , Licheng Pan , Lei Shen , Xiaoxi Li , Yinuo Wang , Zhichao Chen , Yuan Lu , Haoxuan Li , Zhouchen Lin

How can Large Language Models (LLMs) be aligned with human intentions and values? A typical solution is to gather human preference on model outputs and finetune the LLMs accordingly while ensuring that updates do not deviate too far from a…

计算与语言 · 计算机科学 2024-05-28 Hung Le , Quan Tran , Dung Nguyen , Kien Do , Saloni Mittal , Kelechi Ogueji , Svetha Venkatesh

Preference modeling techniques, such as direct preference optimization (DPO), has shown effective in enhancing the generalization abilities of large language model (LLM). However, in tasks involving video instruction-following, providing…

计算机视觉与模式识别 · 计算机科学 2024-04-03 Ruohong Zhang , Liangke Gui , Zhiqing Sun , Yihao Feng , Keyang Xu , Yuanhan Zhang , Di Fu , Chunyuan Li , Alexander Hauptmann , Yonatan Bisk , Yiming Yang

Reinforcement Learning from Human Feedback (RLHF) has become central to aligning large language models with human values, typically by first learning a reward model from preference data which is then used to update the model with…

机器学习 · 计算机科学 2025-10-21 Keertana Chidambaram , Karthik Vinay Seetharaman , Vasilis Syrgkanis

Direct Alignment Algorithms (DAAs), such as Direct Preference Optimization (DPO) and Simple Preference Optimization (SimPO), have emerged as efficient alternatives to Reinforcement Learning from Human Feedback (RLHF) algorithms for aligning…

计算与语言 · 计算机科学 2026-04-17 Zeguan Xiao , Yun Chen , Guanhua Chen , Ke Tang

A critical component of the current generation of language models is preference alignment, which aims to precisely control the model's behavior to meet human needs and values. The most notable among such methods is Reinforcement Learning…

人工智能 · 计算机科学 2024-10-22 Oh Joon Kwon , Daiki E. Matsunaga , Kee-Eung Kim

Reinforcement Learning from Human Feedback (RLHF) has become central to aligning large language models with human values, typically by first learning a reward model from preference data which is then used to update the model with…

人工智能 · 计算机科学 2025-10-20 Keertana Chidambaram , Karthik Vinary Seetharaman , Vasilis Syrgkanis

Reinforcement Learning from Human Feedback (RLHF) has achieved considerable success in aligning large language models (LLMs) by modeling human preferences with a learnable reward model and employing a reinforcement learning algorithm to…

机器学习 · 计算机科学 2025-05-20 Jianfeng Cai , Jinhua Zhu , Ruopei Sun , Yue Wang , Li Li , Wengang Zhou , Houqiang Li

Aligning Large Language Models (LLMs) to human preferences in content, style, and presentation is challenging, in part because preferences are varied, context-dependent, and sometimes inherently ambiguous. While successful, Reinforcement…

机器学习 · 计算机科学 2024-10-29 Sam Houliston , Alizée Pace , Alexander Immer , Gunnar Rätsch

For aligning large language models (LLMs), prior work has leveraged reinforcement learning via human feedback (RLHF) or variations of direct preference optimization (DPO). While DPO offers a simpler framework based on maximum likelihood…

人工智能 · 计算机科学 2025-05-27 Anirudhan Badrinath , Prabhat Agarwal , Jiajing Xu

Direct Preference Optimization (DPO) is a widely adopted offline algorithm for preference-based reinforcement learning from human feedback (RLHF), designed to improve training simplicity and stability by redefining reward functions.…

计算与语言 · 计算机科学 2025-05-30 Gengxu Li , Tingyu Xia , Yi Chang , Yuan Wu

The increasing capabilities of large language models (LLMs) raise opportunities for artificial general intelligence but concurrently amplify safety concerns, such as potential misuse of AI systems, necessitating effective AI alignment.…

机器学习 · 计算机科学 2023-09-29 Chaoqi Wang , Yibo Jiang , Chenghao Yang , Han Liu , Yuxin Chen

Though significant advancements have been achieved in developing long-context large language models (LLMs), the compromised quality of LLM-synthesized data for supervised fine-tuning (SFT) often affects the long-context performance of SFT…

计算与语言 · 计算机科学 2024-10-29 Jiajie Zhang , Zhongni Hou , Xin Lv , Shulin Cao , Zhenyu Hou , Yilin Niu , Lei Hou , Yuxiao Dong , Ling Feng , Juanzi Li