Step 3.7 Flash
Step 3.7 Flash is StepFun's flagship multimodal reasoning model, a sparse MoE with 11B active parameters and native image and video understanding. It supports a context window of 256K tokens and a max output of 256K tokens per request.
Implicit CachingReasoningTool UseVision (Image)
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 | 0.6s | 106tps | $0.09/M | $0.30/M | Read:$0.02/M Write:— | — | — | +1 |  | 01/29/2026 |
