HWM introduces a hierarchical planning structure to world models, addressing challenges in long-horizon tasks by organizing phase-level paths and managing local actions. This approach mitigates prediction errors and reduces planning costs, enabling more effective multi-stage control. In experiments, HWM achieved a 70% success rate in real-world tasks, compared to 0% for single-layer models, while also reducing computational costs significantly. The development of HWM follows advancements in world models like V-JEPA 2, which focuses on world representation and prediction. HWM builds on these capabilities by enhancing task planning, while WAV emphasizes verification and correction of prediction distortions. Together, these models are shifting the focus from mere prediction to integrating prediction, planning, and verification into cohesive system capabilities.