# OpenAI: GPT-5 Pro — Use via Hanzo AI API

> GPT-5 Pro is OpenAI’s most advanced model, offering major improvements in reasoning, code quality, and user experience. It is optimized for ... Access via Hanzo's OpenAI-compatible API. Context: 400K. Get started free.

[Models](https://hanzo.ai/models)/[OpenAI](https://hanzo.ai/models/openai)/gpt-5-pro

# OpenAI: GPT-5 Pro

[OpenAI](https://hanzo.ai/models/openai)

GPT-5 Pro is OpenAI’s most advanced model, offering major improvements in reasoning, code quality, and user experience. It is optimized for complex tasks that require step-by-step reasoning, instruction following, and...

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## Specifications

Context Window

400K

Modalities

text

Input

$18.00 / M tokens

Output

$144.00 / M tokens

Status

available

Category

third-party

Model ID

openai/gpt-5-pro

## 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: 'openai/gpt-5-pro', 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="openai/gpt-5-pro", 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": "openai/gpt-5-pro", "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: "openai/gpt-5-pro", Messages: []openai.ChatCompletionMessage{ {Role: openai.ChatMessageRoleUser, Content: "Hello!"}, }, }, ) fmt.Println(resp.Choices[0].Message.Content) }
```

## More from OpenAI

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[View all OpenAI models →](https://hanzo.ai/models/openai)

## Use OpenAI: GPT-5 Pro via Hanzo AI

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