StepSafe-4B-SFT

The supervised warm start of StepSafe-4B (Qwen3-4B, fp32 weights). ASPO training starts from it, with the StepSafe code (github.com/carriegu0818/StepSafe):

SFT_CKPT=<path to this model> bash scripts/train_stepsafe_4b.sh

Citation

@misc{stepsafe,
  title  = {StepSafe: Learning Timely Intervention with Context-Aware Safety Reasoning},
  author = {Anonymous},
  year   = {2026}
}