Step 3.7 Flash
StepFun’s flagship multimodal reasoning model. Powered by a 198B-parameter / 11B-activation sparse MoE architecture, with native support for image and video understanding.
ReasoningVision (Image)Tool Use
index.ts
import { streamText } from 'ai'
const result = streamText({ model: 'stepfun/step-3.7-flash', prompt: 'Why is the sky blue?'})More models by StepFun
| Model |
|---|
| 262K | 0.2s | 49tps | $0.09/M | $0.30/M | Read:— Write:$0.02/M | — | — |  | 01/29/2026 |
