Preprint
Aug 2026
When Correct Solutions Repeat: Rarity-Aware Credit Redistribution for GRPO
Cue-GRPO improves AIME repeated-sampling performance and introduces a partition- conditioned rule that redistributes positive advantages accord- ing to cluster rarity, with Strategy Cues providing a low-overhead implementation for competition mathematics.
Zhenzhen Cao, Miao-Wen Wen, Fangjiong Chen
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