---
title: stepfun-ai/Step-5-Preview-BF16
url: https://recentmodel.com/models/stepfun-ai/Step-5-Preview-BF16/
status: archived
published: 2026-09-20T03:52:06Z
updated: 2026-10-20T11:19:23Z
source: https://huggingface.co/stepfun-ai/Step-5-Preview-BF16
---

# stepfun-ai/Step-5-Preview-BF16

Step 5 Preview is a sparse Mixture-of-Experts (MoE) model with 600B total parameters and 27B active parameters. Mixture-of-experts, 604B total, 27B active (352 experts, 8 per token). Context: 1M tokens (config). License: other.


- **Org:** stepfun-ai
- **Released:** 2026-09-20
- **Status:** archived
- **License:** other (restricted)
- **Parameters:** 604.3B total, 27.0B active
- **Architecture:** MoE · 352 experts, 8/token · Step5ForConditionalGeneration
- **Context:** 1,048,576 tokens
- **Signal:** 54 HF likes · 527 downloads · 4 X likes · 3 X post(s)
- **Archived:** 2026-10-20 (aged out (older than 30 days); stats as last seen)

## Runs on

mixed: real files + estimate; sizing calculation, not tested.

- Q4 ~400.6 GB (estimated): no listed device
- Q8 ~680.1 GB (estimated): no listed device
- FP16 ~1252.9 GB: no listed device

## Links

- [Hugging Face](https://huggingface.co/stepfun-ai/Step-5-Preview-BF16)