X Square Robot has released WALL-SS, a next-scale autoregressive world model designed to move beyond single-clip video generation used in traditional diffusion models. The company said the model uses a “next-scale autoregressive” architecture and delivers three advances: prediction-anchored actions, long-term stability, and verifiability. In related tests, WALL-SS was able to simulate 60 seconds stably. The release follows an earlier report in early August that X Square Robot, an embodied intelligence startup, had confidentially filed a listing application with the Hong Kong Stock Exchange.