A reinforcement learning method using a learned world model to choose actions.
MBRL is like trying a skateboard trick in a video game first. Your knees send a thank-you card.
It learns a mini world, then tries choices there before acting. Robots and self-driving cars use it to cut real test runs, but a bad model can steer them wrong.
RL
MBRL belongs to RL and learns the environment first.
World model
A World model acts like its practice world for predictions.
MDP
MBRL often uses an MDP to plan from state changes.
MCTS
MCTS can search a few moves inside its practice world.