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Skip-Thinking: Chunk-wise Chain-of-Thought Distillation Enable Smaller Language Models to Reason Better and Faster

Xiaoshu Chen, Sihang Zhou, Ke Liang, Xiaoyu Sun, Xinwang Liu

Splits teacher rationales into chunks, then trains a student to skip chunks whose removal preserves the answer. The model retains key written steps while internalizing transitional or summary chunks.

First public: · Added to this list: November 2, 2026

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ArXiv preprint

arXiv:2505.18642 · Initial submission: 2025-05-24

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Internalized reasoning — Learn from worked solutions so that some or all of the reasoning can later happen without writing those steps. Training may use a separate teacher model or progressively remove written steps from the model being trained.