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Reinforcement learning (RL) is a promising approach for aligning large language models (LLMs) knowledge with sequential decision-making tasks. However, few studies have thoroughly investigated the impact on LLM agents capabilities of…

Understanding real-world videos with complex semantics and long temporal dependencies remains a fundamental challenge in computer vision. Recent progress in multimodal large language models (MLLMs) has demonstrated strong capabilities in…

Computer Vision and Pattern Recognition · Computer Science 2025-06-03 Hongyu Li , Songhao Han , Yue Liao , Junfeng Luo , Jialin Gao , Shuicheng Yan , Si Liu

Reinforcement learning (RL) enhanced large language models (LLMs), particularly exemplified by DeepSeek-R1, have exhibited outstanding performance. Despite the effectiveness in improving LLM capabilities, its implementation remains highly…

Computation and Language · Computer Science 2025-02-25 Shuhe Wang , Shengyu Zhang , Jie Zhang , Runyi Hu , Xiaoya Li , Tianwei Zhang , Jiwei Li , Fei Wu , Guoyin Wang , Eduard Hovy

Value estimation is a critical component of the reinforcement learning (RL) paradigm. The question of how to effectively learn value predictors from data is one of the major problems studied by the RL community, and different approaches…

Machine Learning · Computer Science 2020-10-22 Arthur Guez , Fabio Viola , Théophane Weber , Lars Buesing , Steven Kapturowski , Doina Precup , David Silver , Nicolas Heess

Reinforcement Learning (RL) agents have great successes in solving tasks with large observation and action spaces from limited feedback. Still, training the agents is data-intensive and there are no guarantees that the learned behavior is…

Artificial Intelligence · Computer Science 2021-10-20 Helge Spieker

Large language model alignment via reinforcement learning depends critically on reward function quality. However, static, domain-specific reward models are often costly to train and exhibit poor generalization in out-of-distribution…

Computation and Language · Computer Science 2026-03-03 Andrew Zhuoer Feng , Cunxiang Wang , Bosi Wen , Yidong Wang , Yu Luo , Hongning Wang , Minlie Huang

Multimodal Reward Models (MRMs) play a crucial role in enhancing the performance of Multimodal Large Language Models (MLLMs). While recent advancements have primarily focused on improving the model structure and training data of MRMs, there…

Computer Vision and Pattern Recognition · Computer Science 2025-05-12 Yi-Fan Zhang , Xingyu Lu , Xiao Hu , Chaoyou Fu , Bin Wen , Tianke Zhang , Changyi Liu , Kaiyu Jiang , Kaibing Chen , Kaiyu Tang , Haojie Ding , Jiankang Chen , Fan Yang , Zhang Zhang , Tingting Gao , Liang Wang

Inverse reinforcement learning (IRL) infers a reward function from demonstrations, allowing for policy improvement and generalization. However, despite much recent interest in IRL, little work has been done to understand the minimum set of…

Machine Learning · Computer Science 2019-08-19 Daniel S. Brown , Scott Niekum

The challenge of developing powerful and general Reinforcement Learning (RL) agents has received increasing attention in recent years. Much of this effort has focused on the single-agent setting, in which an agent maximizes a predefined…

Machine Learning · Computer Science 2020-10-21 Jiachen Yang , Ang Li , Mehrdad Farajtabar , Peter Sunehag , Edward Hughes , Hongyuan Zha

The development of autonomous agents for complex, long-horizon tasks is a central goal in AI. However, dominant training paradigms face a critical limitation: reinforcement learning (RL) methods that optimize solely for final task success…

Machine Learning · Computer Science 2025-07-31 Zijing Zhang , Ziyang Chen , Mingxiao Li , Zhaopeng Tu , Xiaolong Li

In robotic systems, the performance of reinforcement learning depends on the rationality of predefined reward functions. However, manually designed reward functions often lead to policy failures due to inaccuracies. Inverse Reinforcement…

Robotics · Computer Science 2025-09-12 Yongkai Tian , Yirong Qi , Xin Yu , Wenjun Wu , Jie Luo

While Reinforcement Learning (RL) aims to train an agent from a reward function in a given environment, Inverse Reinforcement Learning (IRL) seeks to recover the reward function from observing an expert's behavior. It is well known that, in…

Machine Learning · Computer Science 2022-10-14 Paul Rolland , Luca Viano , Norman Schuerhoff , Boris Nikolov , Volkan Cevher

Reinforcement learning (RL) agents improve through trial-and-error, but when reward is sparse and the agent cannot discover successful action sequences, learning stagnates. This has been a notable problem in training deep RL agents to…

Artificial Intelligence · Computer Science 2018-02-27 Evan Zheran Liu , Kelvin Guu , Panupong Pasupat , Tianlin Shi , Percy Liang

In this article, we aim to provide a literature review of different formulations and approaches to continual reinforcement learning (RL), also known as lifelong or non-stationary RL. We begin by discussing our perspective on why RL is a…

Machine Learning · Computer Science 2022-11-15 Khimya Khetarpal , Matthew Riemer , Irina Rish , Doina Precup

Reinforcement Learning is an area of Machine Learning focused on how agents can be trained to make sequential decisions, and achieve a particular goal within an arbitrary environment. While learning, they repeatedly take actions based on…

Reinforcement learning (RL) algorithms aim to learn optimal decisions in unknown environments through experience of taking actions and observing the rewards gained. In some cases, the environment is not influenced by the actions of the RL…

Reinforcement Learning (RL) is a potent tool for sequential decision-making and has achieved performance surpassing human capabilities across many challenging real-world tasks. As the extension of RL in the multi-agent system domain,…

Artificial Intelligence · Computer Science 2024-08-20 Ruiqi Zhang , Jing Hou , Florian Walter , Shangding Gu , Jiayi Guan , Florian Röhrbein , Yali Du , Panpan Cai , Guang Chen , Alois Knoll

Reinforcement learning (RL) has shown great promise with algorithms learning in environments with large state and action spaces purely from scalar reward signals. A crucial challenge for current deep RL algorithms is that they require a…

Machine Learning · Computer Science 2023-11-23 Shivakanth Sujit , Pedro H. M. Braga , Jorg Bornschein , Samira Ebrahimi Kahou

Recent studies have successfully integrated large vision-language models (VLMs) into low-level robotic control by supervised fine-tuning (SFT) with expert robotic datasets, resulting in what we term vision-language-action (VLA) models.…

Robotics · Computer Science 2025-01-29 Yanjiang Guo , Jianke Zhang , Xiaoyu Chen , Xiang Ji , Yen-Jen Wang , Yucheng Hu , Jianyu Chen

With the fast improvement of machine learning, reinforcement learning (RL) has been used to automate human tasks in different areas. However, training such agents is difficult and restricted to expert users. Moreover, it is mostly limited…

Machine Learning · Computer Science 2023-03-21 André Correia , Luís A. Alexandre