xAI: Grok Code Fast 1 API

Access xAI: Grok Code Fast 1 from xAI using Puter.js AI API.

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Model Card

Grok Code Fast 1 is a speedy, economical reasoning model built from scratch specifically for agentic coding workflows, released August 2025. It excels at TypeScript, Python, Java, Rust, C++, and Go with a 256K context window and ~92 tokens/second throughput.

Context Window N/A

tokens

Max Output 256K

tokens

Input Cost $0.2

per million tokens

Output Cost $1.5

per million tokens

Input text

modalities

Tool Use Yes

 

Knowledge Cutoff Oct 2023

 

Release Date Aug 28, 2025

 

API Usage Example

Add xAI: Grok Code Fast 1 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: "x-ai/grok-code-fast-1"
}).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: "x-ai/grok-code-fast-1"
        }).then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

View full documentation →

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Frequently Asked Questions

What is this xAI: Grok Code Fast 1 API about?

The xAI: Grok Code Fast 1 API gives you access to xAI's chat model through Puter.js. With just a few lines of JavaScript, you can integrate xAI: Grok Code Fast 1 into any web app or Node.js project — no API keys, no backend, and no configuration required.

Who created xAI: Grok Code Fast 1?

xAI: Grok Code Fast 1 was created by xAI and released on Aug 28, 2025.

What is the max output length of xAI: Grok Code Fast 1?

xAI: Grok Code Fast 1 can generate up to 256K tokens in a single response.

What is the knowledge cutoff of xAI: Grok Code Fast 1?

xAI: Grok Code Fast 1 has a knowledge cutoff date of Oct 2023. This means the model was trained on data available up to that date.

What types of input can xAI: Grok Code Fast 1 process?

xAI: Grok Code Fast 1 accepts the following input types: text. It produces: text.

Does xAI: Grok Code Fast 1 support tool use (function calling)?

Yes, xAI: Grok Code Fast 1 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 xAI: Grok Code Fast 1 API is available through the User-Pays Model. As a developer, you can add the xAI: Grok Code Fast 1 API to your app for free — your users pay for their own AI costs directly.
Price per 1M tokens
Input$0.2
Output$1.5
How do I access the xAI: Grok Code Fast 1 API?

You can access the xAI: Grok Code Fast 1 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 xAI: Grok Code Fast 1 API work with React / Vue / Vanilla JS / Node / etc.?

Yes — the xAI: Grok Code Fast 1 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 xAI: Grok Code Fast 1 to your app without worrying about API keys or setup.

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