OpenAI o1 API

Access OpenAI o1 from OpenAI using Puter.js AI API.

Get Started

Model Card

OpenAI o1 is a reasoning model that thinks before answering using chain-of-thought, excelling at complex science and mathematics tasks. It was the first in OpenAI's "o" series designed for step-by-step logical reasoning.

Context Window N/A

tokens

Max Output 100K

tokens

Input Cost $15

per million tokens

Output Cost $60

per million tokens

Input text, image

modalities

Tool Use Yes

 

Knowledge Cutoff Sep 2023

 

Release Date Dec 5, 2024

 

API Usage Example

Add OpenAI o1 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/o1"
}).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/o1"
        }).then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

View full documentation →

More Models from OpenAI

Chat

GPT-5.4

GPT-5.4 is OpenAI's latest frontier model released on March 5, 2026, designed for complex profession...

 Chat

GPT-5.4 Pro

GPT-5.4 Pro is a higher-compute version of GPT-5.4 that allocates more reasoning time to produce sma...

 Chat

GPT-5.3 Chat

GPT-5.3 Chat is OpenAI's latest conversational model update (also known as GPT-5.3 Instant), designe...

View all OpenAI models →

Frequently Asked Questions

What is this OpenAI o1 API about?

The OpenAI o1 API gives you access to OpenAI's chat model through Puter.js. With just a few lines of JavaScript, you can integrate OpenAI o1 into any web app or Node.js project — no API keys, no backend, and no configuration required.

Who created OpenAI o1?

OpenAI o1 was created by OpenAI and released on Dec 5, 2024.

What is the max output length of OpenAI o1?

OpenAI o1 can generate up to 100K tokens in a single response.

What is the knowledge cutoff of OpenAI o1?

OpenAI o1 has a knowledge cutoff date of Sep 2023. This means the model was trained on data available up to that date.

What types of input can OpenAI o1 process?

OpenAI o1 accepts the following input types: text, image. It produces: text.

Does OpenAI o1 support tool use (function calling)?

Yes, OpenAI o1 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 o1 API is available through the User-Pays Model. As a developer, you can add the OpenAI o1 API to your app for free — your users pay for their own AI costs directly.
Price per 1M tokens
Input$15
Output$60
How do I access the OpenAI o1 API?

You can access the OpenAI o1 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 o1 API work with React / Vue / Vanilla JS / Node / etc.?

Yes — the OpenAI o1 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 o1 to your app without worrying about API keys or setup.

Read the Docs View Tutorials