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
stepfun/step-5-preview- Lab
- StepFun
- Family
- -
- Providers
- 9
- Context
- 1,000,000
- Output limit
- 1,000,000
- Knowledge
- -
- Release
- 2026-09-16
- Updated
- 2026-09-20
- Weights
- Closed
- Input
- Output types
- Capabilities
- tools, reasoning, structured
Providers
9| Provider | Lab | Model ID | Context | Output | Price | Reasoning | Tool Call | Structured | Temperature |
|---|---|---|---|---|---|---|---|---|---|
| AIHubMix | StepFun | step-5-preview | 1,000,000 | 1,000,000 | $1.08 / $3.09 | Yes | Yes | Yes | - |
| Eden AI | StepFun | tencent/step-5-preview | 1,000,000 | 1,000,000 | $1.00 / $2.70 | Yes | No | No | - |
| EmpirioLabs AI | StepFun | step-5-preview | 1,024,000 | 131,072 | $1.00 / $2.70 | Yes | Yes | Yes | Yes |
| NanoGPT | StepFun | stepfun/step-5-preview | 1,000,000 | 1,000,000 | $1.00 / $2.70 | Yes | Yes | Yes | - |
| StepFun (China) | StepFun | step-5-preview | 1,000,000 | 65,536 | $0.96 / $2.74 | Yes | Yes | Yes | - |
| StepFun (Global) | StepFun | step-5-preview | 1,024,000 | 65,536 | $1.00 / $2.70 | Yes | Yes | Yes | - |
| StepFun Step Plan (China) | StepFun | step-5-preview | 1,000,000 | 65,536 | - | Yes | Yes | Yes | - |
| StepFun Step Plan (Global) | StepFun | step-5-preview | 1,000,000 | 65,536 | - | Yes | Yes | Yes | - |
| Vercel AI Gateway | StepFun | stepfun/step-5-preview | 1,000,000 | 1,000,000 | $1.00 / $2.70 | No | No | Yes | - |
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