PUST Decouples Exploration From Alignment in LLM Post-Training
July 13, 2026
Proxy-guided Update Signal Transfer (PUST) decouples policy exploration from distribution alignment by using a lightweight proxy model to discover high-reward behaviors. This approach enables asynchronous generation and cross-model transfer of optimization signals, reducing the computational cost of direct exploration on the primary policy model.
HOW THIS AFFECTS YOU
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researcherYou can potentially reduce post-training costs by using lightweight proxies for reward discovery.