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News/Select and Improve: Understanding the Mechanics of Post-Training for Reasoning
arxiv
PublishedJune 12, 2026 at 4:00 AM

Select and Improve: Understanding the Mechanics of Post-Training for Reasoning

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arXiv:2606.13125v1 Announce Type: cross Abstract: Reinforcement learning has rapidly emerged as a key component in the training of reasoning and coding models, yet it remains poorly understood from a mechanistic perspective. We study how and through what underlying processes capabilities are acquire

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