jaxgcrl 0.2.1

Blazingly fast goal-conditioned environments based on MJX and BRAX.

JaxGCRL

Installation | Quick Start | Environments | Baselines | Citation

Accelerating Goal-Conditioned RL Algorithms and Research

We provide blazingly fast goal-conditioned environments based on MJX and BRAX for quick experimentation with goal-conditioned self-supervised reinforcement learning.

• Blazingly Fast Training - Train 10 million environment steps in 10 minutes on a single GPU, up to $22\times$ faster than prior implementations.
• Comprehensive Benchmarking - Includes 10+ diverse environments and multiple pre-implemented baselines for out-of-the-box evaluation.
• Modular Implementation - Designed for clarity and scalability, allowing for easy modification of algorithms.

Installation 📂

The environment can be set up from the environment.yml file.

conda env create -f environment.yml

Quick Start 🚀

To verify the installation, run a test experiment using the ./scripts/train.sh file:

chmod +x ./scripts/train.sh; ./scripts/train.sh

[!NOTE]
If you haven't yet configured wandb, you may be prompted to log in.

Specific configs can be specified as in scripts/train.sh. The descriptions of the available flags are in utils.py:create_parser(). Common flags you may want to change include:

• env=...: replace "ant" with any environment name. See utils.py:create_env() for names.
• Removing --log_wandb: omits logging, if you don't want to use a wandb account.
• --total_env_steps: shorter or longer runs.
• --num_envs: based on how many environments your GPU memory allows.
• --contrastive_loss_fn, --energy_fn, --h_dim, --n_hidden, etc.: algorithmic and architectural changes.

Environment Interaction

Environments can be controlled with the reset and step functions. These methods return a state object, which is a dataclass containing the following fields:

state.pipeline_state: current, internal state of the environment
state.obs: current observation
state.done: flag indicating if the agent reached the goal
state.metrics: agent performance metrics
state.info: additional info

The following code demonstrates how to interact with the environment:

import jax
from utils.env import create_env

key = jax.random.PRNGKey(0)

# Initialize the environment
env = create_env('ant')

# Use JIT compilation to make environment's reset and step functions execute faster
jit_env_reset = jax.jit(env.reset)
jit_env_step = jax.jit(env.step)

NUM_STEPS = 1000

# Reset the environment and obtain the initial state
state = jit_env_reset(key)

# Simulate the environment for a fixed number of steps
for _ in range(NUM_STEPS):
    # Generate a random action
    key, key_act = jax.random.split(key, 2)
    random_action = jax.random.uniform(key_act, shape=(8,), minval=-1, maxval=1)
    
    # Perform an environment step with the generated action
    state = jit_env_step(state, random_action)

Wandb support 📈

We strongly recommend using Wandb for tracking and visualizing results (Wandb support). Enable Wandb logging with the --log_wandb flag. The following flags are also available to organize experiments:

• --project_name
• --group_name
• --exp_name

The --log_wandb flag logs metrics to Wandb. By default, metrics are logged to a CSV.

1. Run example sweep:

wandb sweep --project example_sweep ./scripts/sweep.yml

2. Then run wandb agent with :

wandb agent <previous_command_output>

We also render videos of the learned policies as wandb artifacts.

Environments 🌎

We currently support a variety of continuous control environments:

• Locomotion: Half-Cheetah, Ant, Humanoid
• Locomotion + task: AntMaze, AntBall (AntSoccer), AntPush, HumanoidMaze
• Simple arm: Reacher, Pusher, Pusher 2-object
• Manipulation: Reach, Grasp, Push (easy/hard), Binpick (easy/hard)

Environment	Env name	Code
Reacher	reacher	link
Half Cheetah	cheetah	link
Pusher	pusher_easy pusher_hard	link
Ant	ant	link
Ant Maze	ant_u_maze ant_big_maze ant_hardest_maze	link
Ant Soccer	ant_ball	link
Ant Push	ant_push	link
Humanoid	humanoid	link
Humanoid Maze	humanoid_u_maze humanoid_big_maze humanoid_hardest_maze	link
Arm Reach	arm_reach	link
Arm Grasp	arm_grasp	link
Arm Push	arm_push_easy arm_push_hard	link
Arm Binpick	arm_binpick_easy arm_binpick_hard	link

To add new environments: add an XML to envs/assets, add a python environment file in envs, and register the environment name in utils.py.

Baselines 🤖

We currently support following algorithms:

Algorithm	How to run	Code
CRL	python run.py crl ...	link
PPO	python run.py ppo ...	link
SAC	python run.py sac ...	link
SAC + HER	python run.py sac ... --use_her	link
TD3	python run.py td3 ...	link
TD3 + HER	python run.py td3 ... --use_her	link

Code Structure 📝

The core structure of the codebase is as follows:

run.py: Takes the name of an agent and runs with the specified configs.
agents/
├── agents/
│   ├── crl/ 
│   │   ├── crl.py CRL algorithm 
│   │   ├── losses.py contrastive losses and energy functions
│   │   └── networks.py CRL network architectures
│   ├── ppo/ 
│   │   └── ppo.py PPO algorithm 
│   ├── sac/ 
│   │   ├── sac.py SAC algorithm
│   │   └── networks.py SAC network architectures
│   └── td3/ 
│       ├── td3.py TD3 algorithm
│       ├── losses.py TD3 loss functions
│       └── networks.py TD3 network architectures
├── utils/
│   ├── config.py Base run configs
│   ├── env.py Logic for rendering and environment initialization
│   ├── replay_buffer.py: Contains replay buffer, including logic for state, action, and goal sampling for training.
│   └── evaluator.py: Runs evaluation and collects metrics.
├── envs/
│   ├── ant.py, humanoid.py, ...: Most environments are here.
│   ├── assets: Contains XMLs for environments.
│   └── manipulation: Contains all manipulation environments.
└── scripts/train.sh: Modify to choose environment and hyperparameters.

The architecture can be adjusted in networks.py.

Contributing 🏗️

Help us build JaxGCRL into the best possible tool for the GCRL community. Reach out and start contributing or just add an Issue/PR!

• Add Franka robot arm environments. [Done by SimpleGeometry]
• Get around 70% success rate on Ant Big Maze task. [Done by RajGhugare19]
• Add more complex versions of Ant Sokoban.
• Integrate environments:
  • Overcooked
  • Hanabi
  • Rubik's cube
  • Sokoban

To run tests (make sure you have access to a GPU):

python -m pytest 

Citing JaxGCRL 📜

If you use JaxGCRL in your work, please cite us as follows:

@inproceedings{bortkiewicz2025accelerating,
    author    = {Bortkiewicz, Micha\l{} and Pa\l{}ucki, W\l{}adek and Myers, Vivek and
                 Dziarmaga, Tadeusz and Arczewski, Tomasz and Kuci\'{n}ski, \L{}ukasz and
                 Eysenbach, Benjamin},
    booktitle = {{International Conference} on {Learning Representations}},
    title     = {{Accelerating Goal-Conditioned RL Algorithms} and {Research}},
    url       = {https://arxiv.org/pdf/2408.11052},
    year      = {2025},
}

Questions ❓

If you have any questions, comments, or suggestions, please reach out to Michał Bortkiewicz ([e-mail]).

See Also 🙌

There are a number of other libraries which inspired this work, we encourage you to take a look!

JAX-native algorithms:

• Mava: JAX implementations of IPPO and MAPPO, two popular MARL algorithms.
• PureJaxRL: JAX implementation of PPO, and demonstration of end-to-end JAX-based RL training.
• Minimax: JAX implementations of autocurricula baselines for RL.
• JaxIRL: JAX implementation of algorithms for inverse reinforcement learning.

JAX-native environments:

• Gymnax: Implementations of classic RL tasks including classic control, bsuite and MinAtar.
• Jumanji: A diverse set of environments ranging from simple games to NP-hard combinatorial problems.
• Pgx: JAX implementations of classic board games, such as Chess, Go and Shogi.
• Brax: A fully differentiable physics engine written in JAX, features continuous control tasks.
• XLand-MiniGrid: Meta-RL gridworld environments inspired by XLand and MiniGrid.
• Craftax: (Crafter + NetHack) in JAX.
• JaxMARL: Multi-agent RL in Jax.