Step 5 Preview
18 September 2026
Step 5 Preview from StepFun, language,vision,multimodal model published 2026-09-18. Notable for: discretionary.
Where it runs
| Provider | Model id | Context | Input | Output |
|---|---|---|---|---|
| OpenRouter | stepfun/step-5-preview | 1.05M | $1.00/M | $2.70/M |
Abstract
Step 5 Preview is StepFun's flagship sparse MoE model (about 600B total parameters, about 27B active per token) with text, image and video input, released via API on 18 September 2026 with open weights announced for 15 October 2026.
Sources: Epoch AI, OpenRouter. This entry was generated from a dataset and has not been edited by hand.