GPT-5 Pro API

Access GPT-5 Pro from OpenAI using Puter.js AI API.

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Model Card

GPT-5 Pro is an enhanced version of GPT-5 that thinks longer using parallel test-time compute to provide the highest quality answers. It replaces o3-pro for complex enterprise and research tasks.

Context Window N/A

tokens

Max Output 128K

tokens

Input Cost $15

per million tokens

Output Cost $120

per million tokens

Release Date Jun 10, 2025

 

API Usage Example

Add GPT-5 Pro to your app with just a few lines of code.
No API keys, no backend, no configuration required.

// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';

puter.ai.chat("Explain quantum computing in simple terms", {
    model: "openai/gpt-5-pro"
}).then(response => {
    document.body.innerHTML = response.message.content;
});

<html>
<body>
    <script src="https://js.puter.com/v2/"></script>
    <script>
        puter.ai.chat("Explain quantum computing in simple terms", {
            model: "openai/gpt-5-pro"
        }).then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

View full documentation →

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Frequently Asked Questions

What is this GPT-5 Pro API about?

The GPT-5 Pro API gives you access to OpenAI's chat model through Puter.js. With just a few lines of JavaScript, you can integrate GPT-5 Pro into any web app or Node.js project — no API keys, no backend, and no configuration required.

Who created GPT-5 Pro?

GPT-5 Pro was created by OpenAI and released on Jun 10, 2025.

What is the max output length of GPT-5 Pro?

GPT-5 Pro can generate up to 128K tokens in a single response.

How much does it cost?
The GPT-5 Pro API is available through the User-Pays Model. As a developer, you can add the GPT-5 Pro API to your app for free — your users pay for their own AI costs directly.
Price per 1M tokens
Input$15
Output$120
How do I access the GPT-5 Pro API?

You can access the GPT-5 Pro API with just a few lines of JavaScript — no API keys, no backend, and no configuration required. Include the Puter.js library in your project and start making calls right away. For more details, check out our documentation.

Does the GPT-5 Pro API work with React / Vue / Vanilla JS / Node / etc.?

Yes — the GPT-5 Pro API works with any JavaScript framework, Node.js, or plain HTML through Puter.js. Just include the library and start building. See the documentation for more details.

Get started with Puter.js

Add GPT-5 Pro to your app without worrying about API keys or setup.

Read the Docs View Tutorials