Article

JAM: A Unified Action Model Framework Decoupling Backbone, Objective, and Inference Mechanism

The study proposes the Just Action Model (JAM) framework, which breaks down the differences between VLA and WAM into three separable choices: backbone initialization, the future-observation objective, and whether that loss mechanism is retained at inference. It uses 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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