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Skip a Layer or Loop it? Test-Time Depth Adaptation of Pretrained LLMs

Ziyue Li, Yang Li, Tianyi Zhou

Adapts the depth of pretrained language models at test time by selectively skipping or repeating layers.

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arXiv:2507.07996 · Initial submission: 2025-07-10

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Recurrent reasoning — Repeat parts of the model or keep intermediate information in memory while working through a problem. Some methods also learn how many passes to run.

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