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News/Demystifying OPD: Length Inflation and Stabilization Strategies for Large Language Models
arxiv
PublishedApril 11, 2026 at 4:00 AM
—neutral

Demystifying OPD: Length Inflation and Stabilization Strategies for Large Language Models

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arXiv:2604.08527v1 Announce Type: new Abstract: On-policy distillation (OPD) trains student models under their own induced distribution while leveraging supervision from stronger teachers. We identify a failure mode of OPD: as training progresses, on-policy rollouts can undergo abrupt length inflati

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