GPT-5.2 Codex API

Access GPT-5.2 Codex from OpenAI using Puter.js AI API.

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Model Card

GPT-5.2 Codex is OpenAI's most advanced agentic coding model for professional software engineering and defensive cybersecurity. It achieves state-of-the-art on SWE-Bench Pro with improved long-horizon work through context compaction.

Context Window N/A

tokens

Max Output 128K

tokens

Input Cost $1.75

per million tokens

Output Cost $14

per million tokens

Input text, image, pdf

modalities

Tool Use Yes

 

Knowledge Cutoff Aug 31, 2025

 

Release Date Dec 11, 2025

 

API Usage Example

Add GPT-5.2 Codex 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-5.2-codex"
}).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-5.2-codex"
        }).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-5.2 Codex API about?

The GPT-5.2 Codex API gives you access to OpenAI's chat model through Puter.js. With just a few lines of JavaScript, you can integrate GPT-5.2 Codex into any web app or Node.js project — no API keys, no backend, and no configuration required.

Who created GPT-5.2 Codex?

GPT-5.2 Codex was created by OpenAI and released on Dec 11, 2025.

What is the max output length of GPT-5.2 Codex?

GPT-5.2 Codex can generate up to 128K tokens in a single response.

What is the knowledge cutoff of GPT-5.2 Codex?

GPT-5.2 Codex has a knowledge cutoff date of Aug 31, 2025. This means the model was trained on data available up to that date.

What types of input can GPT-5.2 Codex process?

GPT-5.2 Codex accepts the following input types: text, image, pdf. It produces: text.

Does GPT-5.2 Codex support tool use (function calling)?

Yes, GPT-5.2 Codex 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 GPT-5.2 Codex API is available through the User-Pays Model. As a developer, you can add the GPT-5.2 Codex API to your app for free — your users pay for their own AI costs directly.
Price per 1M tokens
Input$1.75
Output$14
How do I access the GPT-5.2 Codex API?

You can access the GPT-5.2 Codex 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-5.2 Codex API work with React / Vue / Vanilla JS / Node / etc.?

Yes — the GPT-5.2 Codex 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-5.2 Codex to your app without worrying about API keys or setup.

Read the Docs View Tutorials