Step 3.7 Flash

Name: Step 3.7 Flash
Author: Novita AI

proprietary

Step-3.7-Flash is StepFun's flagship high-efficiency multimodal reasoning model, built on a sparse Mixture-of-Experts architecture (198B total / ~11B active parameters) that delivers high throughput and low latency for real-time agentic workflows and high-frequency calls.

Context

262K

Max output

256K

Input price

$0.2/1M tokens

Output price

$1.15/1M tokens

Capabilities

Show unsupported (3)

Reasoning & Interaction

Reasoning

Tool Calling

Output Control

Structured Output

JSON Mode

Infrastructure

Streaming

Details

Model IDstepfun/step-3.7-flash

ProviderNovita AI

CreatorStepFun

Family—

Licenseproprietary

Statusactive

Typechat

Input modalitiestext, image

Output modalitiestext

Open weightNo

Parameters—

Architecture—

Context window262K tokens

Max input—

Max output256K tokens

Reasoning tokens—

Knowledge cutoff—

Release date2026-06-12

Sourceofficial

Tools

Function Callingfunction_calling

Call external functions and APIs

Endpoints

Chat CompletionsPOST

Generate chat responses with messageshttps://api.novita.ai/v3/openai/v1/chat/completions

Pricing

Input

$0.2

Output

$1.15

Cache write

—

Cache read

—

Batch in

—

Batch out

—

API

GET/v1/models/novita/stepfun/step-3.7-flash