# StepFun: Step 3.7 Flash — Use via Hanzo AI API

> Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with a v... Access via Hanzo's OpenAI-compatible API. Context: 262K. Get started free.

[Models](https://hanzo.ai/models)/[StepFun](https://hanzo.ai/models/stepfun)/step-3.7-flash

# StepFun: Step 3.7 Flash

[StepFun](https://hanzo.ai/models/stepfun)

Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with a vision encoder for native image and video understanding, activating roughly 11B parameters...

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## Specifications

Context Window

262K

Modalities

text

Input

$0.240 / M tokens

Output

$1.38 / M tokens

Status

available

Category

third-party

Model ID

stepfun/step-3.7-flash

## Quick Start

TypeScript

```
import OpenAI from 'openai' const client = new OpenAI({ apiKey: process.env.HANZO_API_KEY, baseURL: 'https://api.hanzo.ai/v1' }) const response = await client.chat.completions.create({ model: 'stepfun/step-3.7-flash', messages: [{ role: 'user', content: 'Hello!' }] }) console.log(response.choices[0].message.content)
```

Python

```
from openai import OpenAI client = OpenAI( api_key=os.environ["HANZO_API_KEY"], base_url="https://api.hanzo.ai/v1" ) response = client.chat.completions.create( model="stepfun/step-3.7-flash", messages=[{"role": "user", "content": "Hello!"}] ) print(response.choices[0].message.content)
```

cURL

```
curl https://api.hanzo.ai/v1/chat/completions \ -H "Content-Type: application/json" \ -H "Authorization: Bearer $HANZO_API_KEY" \ -d '{ "model": "stepfun/step-3.7-flash", "messages": [{"role": "user", "content": "Hello!"}] }'
```

Go

```
package main import ( "context" "fmt" "os" "github.com/sashabaranov/go-openai" ) func main() { cfg := openai.DefaultConfig(os.Getenv("HANZO_API_KEY")) cfg.BaseURL = "https://api.hanzo.ai/v1" client := openai.NewClientWithConfig(cfg) resp, _ := client.CreateChatCompletion(context.Background(), openai.ChatCompletionRequest{ Model: "stepfun/step-3.7-flash", Messages: []openai.ChatCompletionMessage{ {Role: openai.ChatMessageRoleUser, Content: "Hello!"}, }, }, ) fmt.Println(resp.Choices[0].Message.Content) }
```

## More from StepFun

[StepFun: Step 3.5 Flash262KStep 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token....](https://hanzo.ai/models/stepfun/step-3.5-flash)

[View all StepFun models →](https://hanzo.ai/models/stepfun)

## Use StepFun: Step 3.7 Flash via Hanzo AI

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