OpenAI o3 API

Access OpenAI o3 from OpenAI using Puter.js AI API.

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Model Card

OpenAI o3 is a powerful reasoning model that pushes the frontier in coding, math, science, and visual perception. It can agentically use all ChatGPT tools and makes 20% fewer major errors than o1 on difficult tasks.

Context Window N/A

tokens

Max Output 100K

tokens

Input Cost $2

per million tokens

Output Cost $8

per million tokens

Input text, image

modalities

Tool Use Yes

 

Knowledge Cutoff May 2024

 

Release Date Apr 16, 2025

 

API Usage Example

Add OpenAI o3 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/o3"
}).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/o3"
        }).then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

View full documentation →

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Frequently Asked Questions

What is this OpenAI o3 API about?

The OpenAI o3 API gives you access to OpenAI's chat model through Puter.js. With just a few lines of JavaScript, you can integrate OpenAI o3 into any web app or Node.js project — no API keys, no backend, and no configuration required.

Who created OpenAI o3?

OpenAI o3 was created by OpenAI and released on Apr 16, 2025.

What is the max output length of OpenAI o3?

OpenAI o3 can generate up to 100K tokens in a single response.

What is the knowledge cutoff of OpenAI o3?

OpenAI o3 has a knowledge cutoff date of May 2024. This means the model was trained on data available up to that date.

What types of input can OpenAI o3 process?

OpenAI o3 accepts the following input types: text, image. It produces: text.

Does OpenAI o3 support tool use (function calling)?

Yes, OpenAI o3 supports tool use (function calling), allowing it to interact with external tools, APIs, and data sources as part of its response flow.

How much does it cost?
The OpenAI o3 API is available through the User-Pays Model. As a developer, you can add the OpenAI o3 API to your app for free — your users pay for their own AI costs directly.
Price per 1M tokens
Input$2
Output$8
How do I access the OpenAI o3 API?

You can access the OpenAI o3 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 OpenAI o3 API work with React / Vue / Vanilla JS / Node / etc.?

Yes — the OpenAI o3 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 OpenAI o3 to your app without worrying about API keys or setup.

Read the Docs View Tutorials