Mattick says the Schmidt-Huber world-model paper concerns model-based reinforcement learning and suggests that applying “world model” to other approaches may misuse the term.

“In fact, at the Schmidt-Huber paper,”

“the world model Schmidt-Huber paper, this is model based RL. So arguably people that now use it for something else other than model based RL are just using their model as using the name wrong. I think it's.”