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The development of autonomous web agents, powered by Large Language Models (LLMs) and reinforcement learning (RL), represents a significant step towards general-purpose AI assistants. However, training these agents is severely hampered by…

Computation and Language · Computer Science 2026-04-21 Hang Ding , Peidong Liu , Junqiao Wang , Ziwei Ji , Meng Cao , Rongzhao Zhang , Lynn Ai , Eric Yang , Tianyu Shi , Lei Yu

Meta-reinforcement learning (meta-RL) is a promising framework for tackling challenging domains requiring efficient exploration. Existing meta-RL algorithms are characterized by low sample efficiency, and mostly focus on low-dimensional…

Machine Learning · Computer Science 2024-03-18 Zohar Rimon , Tom Jurgenson , Orr Krupnik , Gilad Adler , Aviv Tamar

Reinforcement learning (RL) is an appealing paradigm for training intelligent agents, enabling policy acquisition from the agent's own autonomously acquired experience. However, the training process of RL is far from automatic, requiring…

Artificial Intelligence · Computer Science 2025-02-25 Zhao Yang , Thomas M. Moerland , Mike Preuss , Aske Plaat , Edward S. Hu

Model-based reinforcement learning (MBRL) has been proposed as a promising alternative solution to tackle the high sampling cost challenge in the canonical reinforcement learning (RL), by leveraging a learned model to generate synthesized…

Machine Learning · Computer Science 2019-06-06 Yuanlong Li , Linsen Dong , Xin Zhou , Yonggang Wen , Kyle Guan

MushroomRL is an open-source Python library developed to simplify the process of implementing and running Reinforcement Learning (RL) experiments. Compared to other available libraries, MushroomRL has been created with the purpose of…

Machine Learning · Computer Science 2020-01-10 Carlo D'Eramo , Davide Tateo , Andrea Bonarini , Marcello Restelli , Jan Peters

Model-based reinforcement learning (MBRL) is believed to have much higher sample efficiency compared to model-free algorithms by learning a predictive model of the environment. However, the performance of MBRL highly relies on the quality…

Machine Learning · Computer Science 2022-11-16 Xin-Yang Liu , Jian-Xun Wang

Model-based Reinforcement Learning (MBRL) aims to make agents more sample-efficient, adaptive, and explainable by learning an explicit model of the environment. While the capabilities of MBRL agents have significantly improved in recent…

Machine Learning · Computer Science 2024-04-09 Ran Wei , Nathan Lambert , Anthony McDonald , Alfredo Garcia , Roberto Calandra

Model-based reinforcement learning (MBRL) offers an intuitive way to increase the sample efficiency of model-free RL methods by simultaneously training a world model that learns to predict the future. These models constitute the large…

Artificial Intelligence · Computer Science 2025-12-19 Ashish Sundar , Chunbo Luo , Xiaoyang Wang

Reinforcement Learning from Verifiable Rewards (RLVR) suffers from exploration inefficiency, where models struggle to generate successful rollouts, resulting in minimal learning signal. This challenge is particularly severe for tasks that…

Machine Learning · Computer Science 2026-03-20 Saaket Agashe , Jayanth Srinivasa , Gaowen Liu , Ramana Kompella , Xin Eric Wang

Model-based reinforcement learning (MBRL) approaches rely on discrete-time state transition models whereas physical systems and the vast majority of control tasks operate in continuous-time. To avoid time-discretization approximation of the…

Machine Learning · Computer Science 2021-06-14 Çağatay Yıldız , Markus Heinonen , Harri Lähdesmäki

This paper presents LibMTL, an open-source Python library built on PyTorch, which provides a unified, comprehensive, reproducible, and extensible implementation framework for Multi-Task Learning (MTL). LibMTL considers different settings…

Machine Learning · Computer Science 2022-03-29 Baijiong Lin , Yu Zhang

By planning through a learned dynamics model, model-based reinforcement learning (MBRL) offers the prospect of good performance with little environment interaction. However, it is common in practice for the learned model to be inaccurate,…

Machine Learning · Computer Science 2021-03-31 Behzad Haghgoo , Allan Zhou , Archit Sharma , Chelsea Finn

Model-based Reinforcement Learning (MBRL) holds promise for data-efficiency by planning with model-generated experience in addition to learning with experience from the environment. However, in complex or changing environments, models in…

Machine Learning · Computer Science 2022-05-24 Esra'a Saleh , John D. Martin , Anna Koop , Arash Pourzarabi , Michael Bowling

Model-Based Reinforcement Learning (MBRL) offers a promising direction for sample efficient learning, often achieving state of the art results for continuous control tasks. However, many existing MBRL methods rely on combining greedy…

Machine Learning · Computer Science 2020-02-10 Philip Ball , Jack Parker-Holder , Aldo Pacchiano , Krzysztof Choromanski , Stephen Roberts

Multiple Instance Learning (MIL) is a powerful framework for weakly supervised learning, particularly useful when fine-grained annotations are unavailable. Despite growing interest in deep MIL methods, the field lacks standardized tools for…

RSL-RL is an open-source Reinforcement Learning library tailored to the specific needs of the robotics community. Unlike broad general-purpose frameworks, its design philosophy prioritizes a compact and easily modifiable codebase, allowing…

Robotics · Computer Science 2025-09-16 Clemens Schwarke , Mayank Mittal , Nikita Rudin , David Hoeller , Marco Hutter

One problem with researching cognitive modeling and reinforcement learning (RL) is that researchers spend too much time on setting up an appropriate computational framework for their experiments. Many open source implementations of current…

Machine Learning · Computer Science 2024-01-29 Jan Dohmen , Frank Röder , Manfred Eppe

Continual Reinforcement Learning (CRL) is a challenging setting where an agent learns to interact with an environment that is constantly changing over time (the stream of experiences). In this paper, we describe Avalanche RL, a library for…

Machine Learning · Computer Science 2022-03-25 Nicolò Lucchesi , Antonio Carta , Vincenzo Lomonaco , Davide Bacciu

Multi-Agent Reinforcement Learning (MARL) encompasses a powerful class of methodologies that have been applied in a wide range of fields. An effective way to further empower these methodologies is to develop libraries and tools that could…

Machine Learning · Computer Science 2020-04-20 Dmitry Kazhdan , Zohreh Shams , Pietro Liò

In recent years, Reinforcement Learning (RL), has become a popular field of study as well as a tool for enterprises working on cutting-edge artificial intelligence research. To this end, many researchers have built RL frameworks such as…