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cs.LG2026
Prefix-Guided On-Policy Distillation: Mining Golden Trajectories from Rollouts
Qingfei Zhao, Huan Song, Shuyu Tian +2
On-policy distillation (OPD) improves reasoning models by applying dense teacher supervision on student-sampled trajectories. However, scaling OPD to long-horizon reasoning exposes…
cs.LG2026
BPPO: Binary Prefix Policy Optimization for Efficient GRPO-Style Reasoning RL with Concise Responses
Qingfei Zhao, Huan Song, Shuyu Tian +2
Group Relative Policy Optimization (GRPO) is widely used for training reasoning models, but updating all sampled completions in each group incurs substantial cost and can reinforce…
cs.LG2026
Theoretical Foundations of Scaling Law in Familial Models
Huan Song, Qingfei Zhao, Ting Long +4
Neural scaling laws have become foundational for optimizing large language model (LLM) training, yet they typically assume a single dense model output. This limitation effectively…