SFAI / MODEL PROFILE
StepFun: Step 5 Preview
Step 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total parameters). It performs strongly in software engineering and professional...
- Developer
- stepfun
- Input modalities
- text, image, video
- Output modalities
- text
- Context tokens
- 1,000,000
- Latest price observation
- 2026-10-08
- Lowest paired standard token quote
- $1.00 input / $2.70 output per 1M tokens
Dated price and provider records
| Provider and channel | Input | Output or native rate | Unit and status | Source and observation |
|---|---|---|---|---|
| Automatic routingopenrouter | $1.00 | $2.70 | 1M tokenspriced · USD | openrouter2026-10-08 |
These are dated, non-executable observations. Verify the exact endpoint, price and terms with the source before use. Unknown values are not free.