GPT-OSS 120B API

Access GPT-OSS 120B from OpenAI using Puter.js AI API.

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Model Card

GPT-OSS 120B is OpenAI's most powerful open-weight model under Apache 2.0 license, achieving near-parity with o4-mini on reasoning benchmarks. It has 117B total parameters with 5.1B active, fitting on a single H100 GPU.

Context Window

N/A

tokens

Max Output

N/A

tokens

Input Cost

$0.04

per million tokens

Output Cost

$0.19

per million tokens

API Usage Example

Add GPT-OSS 120B 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-oss-120b"
        }).then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

View full documentation →

Get started with Puter.js

Add GPT-OSS 120B to your app without worrying about API keys or setup.

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