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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). 1,000,000 token context window, maximum output of 64,000 tokens.
chatstreamingvisiontoolsjson mode
Details
- Accepts
- text
- Context window
- 1M tokens
Pricing
- Input
- 125 cr / 1M tokens
- Output
- 338 cr / 1M tokens
- Cached input
- 6.25 cr / 1M tokens
Prices in credits (1 credit = $0.01).
Data schema
approximateInput
| Field | Type | Description |
|---|---|---|
| promptrequired | string | The text prompt. |
Output
| Field | Type | Description |
|---|---|---|
| text | string | Generated text (choices[0].message.content). |