A physics simulator for testing robot movement and control.
MuJoCo is a padded gym for robots. They can trip, face-plant, and break only pretend knees.
It trains robot control and RL in simulation. You burn computer time first, not pricey robot parts.
OpenAI Gym
OpenAI Gym used MuJoCo for classic continuous control environments.
RL
RL agents can use MuJoCo to learn by cheap trial and error.
Robotics
MuJoCo simulates robot joints, contact, and motion.
MBRL
MBRL often uses MuJoCo to test physics predictions.