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What RL Brings to Reasoning: A Few Decisions the Base Model Would Not Make

Zhang, Siyu et al.
arXiv (All) · Papers
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computation-and-languagemachine-learning
Reinforcement learning with verifiable rewards (RLVR) substantially improves mathematical reasoning, but what it adds to the base model remains unclear. We investigate this through a sequence of generation-time interventions on Qwen3-4B-Base, measuring how much of its RL-trained counterpart's gain e
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