WAM-Diff2: Hierarchical AR-to-Diffusion Distillation for Highly Efficient Autonomous Driving VLA
WAM-Diff2 converts a pretrained autoregressive driving generalist into a parallel discrete diffusion VLA through progressive block-wise adaptation, block-wise distillation, and model-wise cross-scale distillation—preserving multi-task capabilities while improving inference efficiency.
- 2.8× decoding speedup
- Up to 15.1× system-level speedup