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

128,000

tokens

Input Cost

$15

per million tokens

Output Cost

$120

per million tokens

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.

<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 →

Get started with Puter.js

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

Read the Docs View Tutorials