# StepFun opens Step 5 Preview weights

- Source: 36Kr Embodied Intelligence
- Published: 2026-10-15T05:12:04.000Z
- RoboHot: https://robohot.news/en/items/jhmgpc0k8yplf3zedmcfk803y
- Original: https://36kr.com/newsflashes/4026681337532809?f=rss

## Summary

StepFun announced the official release of the Step 5 Preview weights, including BF16 and FP8 versions, along with a technical blog, supporting open-source development tools, and a deployment guide. The model weights are now available on Hugging Face and ModelScope.