| Field | ||
|---|---|---|
| Organization | StepFun | |
| Family | Step | |
| Released | 2026-05-29 | |
| Context window | 256K | |
| Max output | 256K | |
| Modalities | ImageInputTextInputTextOutputVideoInput | |
| Providers | StepFun Step Plan (Global), StepFun Step Plan (China), Ambient, UnoRouter, ZenMux, EmpirioLabs AI, Vercel AI Gateway, OpenRouter, StepFun (Global), StepFun (China), Kilo Gateway | |
| Weights | Open | |
| Attachments | Native | |
| Reasoning | Native Parameters: reasoning, include_reasoning, reasoning_effort | |
| Tool call | Native Parameters: tools, tool_choice | |
| Structured | - | |
| Temperature | Native Parameters: temperature | |
| Open weight | Native |
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