Step 5 Preview
StepFun's next-generation flagship base model for coding and professional knowledge work, with native text, image, and video input and a 1M-token context window
ReasoningTool CallingAttachmentsStructured Output
Context Window
1M
Max Output
1M
Temperature
No
Open Weights
No
Knowledge Cutoff
N/A
Released
2026-09-16
Last Updated
2026-09-20
Modalities
Input:TextImageVideo
→Output:Text
Available Providers (4)
| Provider | Input /1M | Output /1M | Cache Read /1M | Cache Write /1M | Reasoning | Status |
|---|---|---|---|---|---|---|
 NanoGPT | Rp 17.881 | Rp 48.277 | Rp 895 | — | effort | — |
 Kilo Gateway | Rp 17.881 | Rp 48.277 | Rp 895 | — | effort | — |
 OpenRouter | Rp 17.881 | Rp 48.277 | Rp 895 | — | effort | — |
 Vercel AI Gateway | Rp 17.881 | Rp 48.277 | Rp 895 | — | — | — |