GPT-5 Chat API

Access GPT-5 Chat from OpenAI using Puter.js AI API.

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Model Card

GPT-5 Chat is the non-reasoning version of GPT-5 used in ChatGPT, designed for conversational interactions. It's available as gpt-5-chat-latest in the API and provides fast responses without extended thinking.

Context Window N/A

tokens

Max Output 16K

tokens

Input Cost $1.25

per million tokens

Output Cost $10

per million tokens

Input text, image

modalities

Tool Use No

 

Knowledge Cutoff Sep 30, 2024

 

Release Date Aug 7, 2025

 

API Usage Example

Add GPT-5 Chat 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-chat"
}).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-chat"
        }).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 Chat API about?

The GPT-5 Chat API gives you access to OpenAI's chat model through Puter.js. With just a few lines of JavaScript, you can integrate GPT-5 Chat into any web app or Node.js project — no API keys, no backend, and no configuration required.

Who created GPT-5 Chat?

GPT-5 Chat was created by OpenAI and released on Aug 7, 2025.

What is the max output length of GPT-5 Chat?

GPT-5 Chat can generate up to 16K tokens in a single response.

What is the knowledge cutoff of GPT-5 Chat?

GPT-5 Chat has a knowledge cutoff date of Sep 30, 2024. This means the model was trained on data available up to that date.

What types of input can GPT-5 Chat process?

GPT-5 Chat accepts the following input types: text, image. It produces: text.

Does GPT-5 Chat support tool use (function calling)?

No, GPT-5 Chat does not currently support tool use (function calling).

How much does it cost?
The GPT-5 Chat API is available through the User-Pays Model. As a developer, you can add the GPT-5 Chat API to your app for free — your users pay for their own AI costs directly.
Price per 1M tokens
Input$1.25
Output$10
How do I access the GPT-5 Chat API?

You can access the GPT-5 Chat 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 Chat API work with React / Vue / Vanilla JS / Node / etc.?

Yes — the GPT-5 Chat 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 Chat to your app without worrying about API keys or setup.

Read the Docs View Tutorials