Article

JAM: A Unified Action Model Framework for VLA and WAM

The authors propose the Just Action Model (JAM) framework, which breaks down the differences between VLA and WAM into three separable choices: backbone initialization, the loss objective on future observations, and whether that loss mechanism is retained at inference. JAM unifies both into a structure of a pretrained visual backbone plus an action expert, trained with an action loss and a foresight loss.

Part of the event: JAM framework unifies VLA and WAM action models

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