xAI: Grok 4.1 Fast Non-Reasoning
x-ai/grok-4-1-fast-non-reasoning
Try Grok 4.1 Fast Non-Reasoning for free in your browser, and add it to your app for free with Puter.js AI API.
Try it free Add to your app// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';
puter.ai.chat("Explain quantum computing in simple terms", {
model: "x-ai/grok-4-1-fast-non-reasoning"
}).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-4-1-fast-non-reasoning"
}).then(response => {
document.body.innerHTML = response.message.content;
});
</script>
</body>
</html>
Model Card
Grok 4.1 Fast Non-Reasoning is the low-latency, non-reasoning variant of Grok 4.1 Fast that skips extended chain-of-thought for speed-critical applications. It shares the same model weights and 2M context window as Grok 4.1 Fast but delivers instant responses without deliberation overhead, ideal for real-time customer support and streaming interactions.
Context Window 2M
tokens
Max Output 2M
tokens
Input Cost $0.2
per million tokens
Output Cost $0.5
per million tokens
Input text, image
modalities
Tool Use Yes
Knowledge Cutoff Jul 2025
Release Date Nov 19, 2025
Try Grok 4.1 Fast Non-Reasoning for free
Try Grok 4.1 Fast Non-Reasoning instantly in your browser.
This playground uses the Puter.js AI API — no API keys or setup required.
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Frequently Asked Questions
You can access Grok 4.1 Fast Non-Reasoning by xAI through Puter.js AI API. Include the library in your web app or Node.js project and start making calls with just a few lines of JavaScript — no backend and no configuration required. You can also use it with Python or cURL via Puter's OpenAI-compatible API.
Grok 4.1 Fast Non-Reasoning is free to try with a Puter account. Every account includes a free AI allowance, and you can chat with it in the playground on this page. You can upgrade your account anytime for a larger allowance.
Grok 4.1 Fast Non-Reasoning is free to integrate using the Puter.js AI API. With the User-Pays Model, you can add AI to your app for $0, since users cover their own AI usage through their Puter account.
| Price per 1M tokens | |
|---|---|
| Input | $0.2 |
| Output | $0.5 |
Grok 4.1 Fast Non-Reasoning was created by xAI and released on Nov 19, 2025.
Grok 4.1 Fast Non-Reasoning supports a context window of 2M tokens. For reference, that is roughly equivalent to 4,000 pages of text.
Grok 4.1 Fast Non-Reasoning can generate up to 2M tokens in a single response.
Grok 4.1 Fast Non-Reasoning has a knowledge cutoff date of Jul 2025. This means the model was trained on data available up to that date.
Grok 4.1 Fast Non-Reasoning accepts the following input types: text, image. It produces: text.
Yes, Grok 4.1 Fast Non-Reasoning supports tool use (function calling), allowing it to interact with external tools, APIs, and data sources as part of its response flow.
Yes — the Grok 4.1 Fast Non-Reasoning 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.
Add Grok 4.1 Fast Non-Reasoning to your app for free
Developers can integrate Grok 4.1 Fast Non-Reasoning for free using the Puter.js AI API.
With the User-Pays Model, each user covers their own AI usage instead of the developer.