GPT-5 Mini API

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

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Model Card

GPT-5 Mini is a faster, more cost-efficient version of GPT-5 optimized for well-defined tasks and precise prompts. It provides a balance between performance and speed for everyday use cases.

Context Window N/A

tokens

Max Output 128K

tokens

Input Cost $0.25

per million tokens

Output Cost $2

per million tokens

Input text, image

modalities

Tool Use Yes

 

Knowledge Cutoff May 30, 2024

 

Release Date Aug 7, 2025

 

API Usage Example

Add GPT-5 Mini 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-mini"
}).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-mini"
        }).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 Mini API about?

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

Who created GPT-5 Mini?

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

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

GPT-5 Mini can generate up to 128K tokens in a single response.

What is the knowledge cutoff of GPT-5 Mini?

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

What types of input can GPT-5 Mini process?

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

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

Yes, GPT-5 Mini 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 Mini API is available through the User-Pays Model. As a developer, you can add the GPT-5 Mini API to your app for free — your users pay for their own AI costs directly.
Price per 1M tokens
Input$0.25
Output$2
How do I access the GPT-5 Mini API?

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

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

Read the Docs View Tutorials