arXiv AI By Wei Yang, Hong Xie, Tao Tan, Xin Li, Defu Lian, Enhong Chen

Model Specific Task Similarity for Vision Language Model Selection via Layer Conductance

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The paper introduces a method for selecting the best vision‑language model for a downstream task by analyzing the internal dynamics of the visual encoder. It represents each task with layer‑wise conductance and uses an entropy‑regularized alignment to derive a target‑conditioned block importance distribution. The proposed Directional Conductance Divergence (DCD) metric captures asymmetric transferability, enabling accurate prediction of model rankings without direct inference, and achieves a 14.7% NDCG@5 improvement over SWAB on 48 VLMs across 21 datasets.

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