What: The Qwen-AgentWorld release (arXiv 2606.24597) trains a language model to be a world model : given the current observation and an agent's action, it predicts the next environment state . The idea it makes concrete is using that model as a decoupled simulator for reinforcement-learning (RL) agents . Why: Training an agent with RL needs a vast number of trial-and-error attempts in an environment — and real environments are slow, costly, and hard to run in parallel. A learned sim...