← Sunday, September 27, 2026Models & trainingPaper

Rufus-Air documents an eight-stage open post-training recipe for GLM-4.5-Air

huggingface.co by Chia-Yuan Chang et al. Editor score 8/10

The recipe details data, rewards, infrastructure, stage order, and results across SFT, several RL stages, agent training, and RLHF; it reports performance above the official post-trained release. Engineers can use its reproducible choices to inform open-model post-training.

What
Rufus-Air is an open, reproducible post-training recipe for GLM-4.5-Air-Base, organized as eight serial stages.
Method
The stages move from SFT and several RL phases through agent training and RLHF; the recipe documents data, rewards, infrastructure, and stagewise results.
Why it matters
Its findings highlight difficulty filtering and reward reliability, and treat infrastructure and engineering choices as part of the training recipe.
SFT Reasoning RL Coding RL Instruction-Fol…RL General Agent Coding Agent
The diagram shows the first six stages in Rufus-Air’s eight-stage sequence. Sketched from the article's own text.

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