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The Layer Mystery of VLA: An Information-Theoretical Analysis of VLA Latent Interface

Liu, Yuxiang et al.
arXiv (All) · Papers
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artificial-intelligence
Vision-language-action (VLA) policies connect a pretrained vision-language backbone to an action head through a latent interface, but which backbone layers this interface should expose remains unclear. We study single-layer selection and multi-layer fusion for frozen backbones across three pretraine
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