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MuJoCo

Lerax versions of the Gymnasium MuJoCo Environments. These environments use MJX, the JAX backend for MuJoCo, enabling fully JIT-compilable physics simulation on GPU/TPU accelerators.

All environments follow the Gymnasium v5 semantics and accept the same configuration parameters as their Gymnasium counterparts.

Locomotion

Environment Description
Ant A four-legged creature that learns to walk forward
HalfCheetah A two-legged creature that learns to run
Hopper A one-legged creature that learns to hop forward
Humanoid A bipedal robot that learns to walk
Swimmer A multi-jointed swimmer in a viscous fluid
Walker2d A bipedal walker that learns to walk forward

Standing

Environment Description
HumanoidStandup A humanoid that learns to stand up from the ground

Balance

Environment Description
InvertedPendulum Balance a pole on a cart
InvertedDoublePendulum Balance two linked poles on a cart

Manipulation

Environment Description
Pusher A robotic arm that pushes an object to a goal
Reacher A robotic arm that reaches a target position