Understanding the Synergy between SFT, RLVR, and OPD in LLM Post-Training.

arXiv:2609.31900v1 Announce Type: cross Abstract: Modern LLM post-training composes supervised fine-tuning (SFT), reinforcement learning with verifiable rewards (RLVR), and on-policy distillation (OPD) into multi-stage pipelines, yet these stages are typically