What is Gemini 3 Pro? Gemini 3 Pro is the first model in Google's new Gemini 3 series, designed for complex tasks requiring broad world knowledge and advanced reasoning across multiple modalities (text, images, video, etc.). It comes with the following key capabilities:
Advanced reasoning: Built on state-of-the-art reasoning foundations Agentic workflows: Designed to handle autonomous tasks and complex workflows Multimodal processing: Can work with text, images, PDFs, and video Dynamic thinking: Uses adaptive reasoning depth based on task complexity Examples Text generation puter.ai.chat("Explain neural networks simply", { model: 'gemini-3-pro-preview' }); Complex reasoning puter.ai.chat("Compare the benefits and drawbacks of solar vs wind energy", { model: 'gemini-3-pro-preview' } ); Code generation puter.ai.chat("Write a Python function to sort a list", { model: 'gemini-3-pro-preview' } ); Get Started Now Just add one script tag to your HTML:
<script src="https://js.puter.com/v2/"></script>No API keys and no infrastructure setup. Start building with Gemini 3 Pro immediately.
Free, Unlimited Gemini API Nariman Jelveh Updated: November 19, 2025 This tutorial will show you how to use Puter.js to access Gemini's powerful language models for free, without any API keys or usage restrictions. Using Puter.js, you can leverage models like Gemini 2.5 Flash, Gemini 2.0 Flash, Gemini 3 Pro, and Gemini 2.5 Pro for various tasks like text generation, image analysis, and complex reasoning, text and code generation, and more.
Puter is the pioneer of the "User-Pays" model, which allows developers to incorporate AI capabilities into their applications while users cover their own usage costs. This model enables developers to access advanced AI capabilities for free, without any API keys or sign-ups.
Getting Started Puter.js works without any API keys or sign-ups. To start using Puter.js, include the following script tag in your HTML file, either in the or section:
<script src="https://js.puter.com/v2/"></script>You're now ready to use Puter.js for free access to Gemini capabilities. No API keys or sign-ups are required.
Example 1: Basic Text Generation with Gemini 2.5 Flash Here's a simple example showing how to generate text using Gemini 2.5 Flash:
<script src="https://js.puter.com/v2/"></script> <script> puter.ai.chat("Explain the concept of black holes in simple terms", { model: 'gemini-2.5-flash' }).then(response => { puter.print(response); }); </script> Example 2: Using Gemini 3 Pro For comparison, here's how to use Gemini 3 Pro: <script src="https://js.puter.com/v2/"></script> <script> puter.ai.chat("What are the major differences between renewable and non-renewable energy sources?", { model: 'gemini-3-pro-preview' }).then(response => { puter.print(response); }); </script> Example 3: Streaming Responses For longer responses, use streaming to get results in real-time: <script src="https://js.puter.com/v2/"></script> <script> async function streamResponses() { const outputDiv = document.getElementById('output'); // Gemini 2.5 Flash with streaming
outputDiv.innerHTML += '<h2>Gemini 2.5 Flash Response:</h2>';
const flashResponse = await puter.ai.chat(
"Explain the process of photosynthesis in detail",
{
model: 'gemini-2.5-flash',
stream: true
}
);
for await (const part of flashResponse) {
if (part?.text) {
outputDiv.innerHTML += part.text.replaceAll('\n', '<br>');
}
}
}
streamResponses();
</script>
')); } }
// Gemini 2.5 Pro
const pro_resp = await puter.ai.chat(
'Tell me something interesting about quantum mechanics.',
{model: 'gemini-2.5-pro', stream: true}
);
puter.print('<h2>Gemini 2.5 Pro Response:</h2>');
for await (const part of pro_resp) {
if (part?.text) {
puter.print(part.text.replaceAll('\n', '<br>'));
}
}
// Gemini 2.5 Flash
const flash_resp = await puter.ai.chat(
'Tell me something interesting about quantum mechanics.',
{model: 'gemini-2.5-flash', stream: true}
);
puter.print('<h2>Gemini 2.5 Flash Response:</h2>');
for await (const part of flash_resp) {
if (part?.text) {
puter.print(part.text.replaceAll('\n', '<br>'));
}
}
})();
</script>
gemini-3-pro-preview gemini-2.5-pro gemini-2.5-flash-lite gemini-2.5-flash gemini-2.0-flash-lite gemini-2.0-flash gemini-1.5-flash That's it! You now have free access to Gemini's powerful language models using Puter.js. This allows you to add sophisticated AI capabilities to your web applications without worrying about API keys or usage limits.
Puter.js Puter.js brings free, serverless, Cloud and AI directly to your frontend JavaScript with no backend code or API keys required. Just include a single <script> tag in your HTML file and you can instantly use file storage, databases, Claude, GPT, Gemini, and more right from your frontend code.
https://super-magical-website.com OpenAI Cloud Storage Claude Gemini NoSQL
<script src="https://js.puter.com/v2/"></script>Publish Web Pages Auth OCR Networking Text to Speech Additionally, with Puter.js, you as the developer pay nothing since each user of your app covers their own Cloud and AI usage. Whether your app has 1 user or 1 million users, it costs you zero to run. Puter.js gives you infinitely scalable infrastructure, completely free.
Puter.js is powered by Puter, the open-source cloud operating system with a heavy focus on privacy. Puter does not use tracking technologies and does not monetize or even collect personal information.
Examples Chat with GPT-5 nano
<script src="https://js.puter.com/v2/"></script> <script> // Chat with GPT-5 nano puter.ai.chat(`What is life?`, { model: "gpt-5-nano" }).then(puter.print); </script> Image Analysis <script src="https://js.puter.com/v2/"></script>
')); })(); </script>