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News/How Instruction and Reasoning Data shape Post-Training: Data Quality through the Lens of Layer-wise Gradients
arxiv
PublishedMay 13, 2026 at 4:00 AM

How Instruction and Reasoning Data shape Post-Training: Data Quality through the Lens of Layer-wise Gradients

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arXiv:2504.10766v2 Announce Type: replace-cross Abstract: As the post-training of large language models (LLMs) advances from instruction-following to complex reasoning tasks, understanding how different data affect finetuning dynamics remains largely unexplored. In this paper, we present a spectral

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