From Rollouts to Recipes: Self-Contained Post-Training for LLMs

Yifei Li, Lingling Zhang, Muye Huang, Zihan Ma, Jiashuai Liu, Jun Liu


Abstract
Post-training large language models usually apply a single training recipe to all samples, even though the model’s own rollouts reveal different sample-level learning states. We propose Self-Routing, a behavior-conditioned post-training framework that uses rollout correctness and confidence to decide how each sample should be optimized. Depending on its behavior state, a sample is routed to GRPO, on-policy self-distillation, regularization, or skipping, allowing training to adapt without external teachers, extra annotations, or additional sampling. Experiments on mathematical reasoning across Qwen3 and Qwen3.5 backbones show that Self-Routing consistently improves over uniform GRPO, uniform OPSD, fixed mixtures, and simpler routing baselines. Further analyses show that the routing distribution changes over training and reduces unnecessary updates on low-signal or already stable samples.
Anthology ID:
2026.emnlp-main.464
Volume:
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing
Month:
October
Year:
2026
Address:
Budapest, Hungary
Editors:
Hung-Yi Lee, Sunipa Dev, Jessy Li, Desmond Elliott
Venue:
EMNLP
SIG:
SIGDAT
Publisher:
Association for Computational Linguistics
Note:
Pages:
10640–10654
Language:
URL:
https://aclanthology.org/2026.emnlp-main.464/
DOI:
Bibkey:
Cite (ACL):
Yifei Li, Lingling Zhang, Muye Huang, Zihan Ma, Jiashuai Liu, and Jun Liu. 2026. From Rollouts to Recipes: Self-Contained Post-Training for LLMs. In Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing, pages 10640–10654, Budapest, Hungary. Association for Computational Linguistics.
Cite (Informal):
From Rollouts to Recipes: Self-Contained Post-Training for LLMs (Li et al., EMNLP 2026)
Copy Citation:
PDF:
https://aclanthology.org/2026.emnlp-main.464.pdf