huggingface/OpenEnv

A toolkit for developing and comparing reinforcement learning algorithms.

A standard API for single-agent reinforcement learning environments, with popular reference environments and related utilities (formerly Gym)

Puffing up reinforcement learning

A standard API for multi-agent reinforcement learning environments, with popular reference environments and related utilities

Isaac Gym Reinforcement Learning Environments

bsuite is a collection of carefully-designed experiments that investigate core capabilities of a reinforcement learning (RL) agent

Simple and easily configurable grid world environments for reinforcement learning

Train your Agent model via our easy and efficient framework

Agent Reinforcement Trainer: train multi-step agents for real-world tasks using GRPO. Give your agents on-the-job training. Reinforcement learning for Qwen3.6, GPT-OSS, Llama, and more!