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...
StepFun: Step 5 Preview — StepFun. Context window 1,000,000 tokens. API pricing (per 1M tokens): Input $1, Output $2.7. License: Proprietary.
| Provider | StepFun |
|---|---|
| API model ID | stepfun/step-5-preview |
| Tier | Frontier |
| Context window | 1,000,000 tokens |
| Max output | 64,000 tokens |
| License | Proprietary |
| API pricing (per 1M tokens) · Input | $1 |
| API pricing (per 1M tokens) · Output | $2.7 |