// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';
puter.ai.chat("Explain quantum computing in simple terms", {
model: "unbiased/pareto"
}).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: "unbiased/pareto"
}).then(response => {
document.body.innerHTML = response.message.content;
});
</script>
</body>
</html>
Model Card
Pareto is a blended AI model from Unbiased AI, built by Circuit & Chisel, a remote-first team based in the US and Canada. Rather than routing a request to one model, it runs several models against the same request and returns the best answer, without switching mid-conversation, which preserves prompt caching.
On Unbiased's published benchmarks, Pareto 26.9 scores 88/100 on ArXivMath and 78/100 on MMMU-Pro, and ties GPT 6 Astra and DeepSeek 4.1 Flash at 74/100 on the DeepSWE coding benchmark. It trails Fable 5.1 and GPT 6 Astra on Terminal-Bench 4.0 and HLE, and Unbiased publishes those losses alongside its wins rather than only citing favorable results.
It accepts text and image input and supports tool calling. It targets engineering teams evaluating model performance, platform teams looking for a cost-effective general-purpose option, and developers building agents that need consistent responses across a session.
Context Window 262K
tokens
Max Output 131K
tokens
Input Cost $2.5
per million tokens
Output Cost $7.5
per million tokens
Tool Use Yes
Release Date Sep 17, 2026
Model Playground
Try Pareto instantly in your browser.
This playground uses the Puter.js AI API — no API keys or setup required.
Frequently Asked Questions
You can access Pareto by Unbiased 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.
Pareto 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 | $2.5 |
| Output | $7.5 |
Pareto was created by Unbiased and released on Sep 17, 2026.
Pareto supports a context window of 262K tokens. For reference, that is roughly equivalent to 524 pages of text.
Pareto can generate up to 131K tokens in a single response.
Yes, Pareto supports tool use (function calling), allowing it to interact with external tools, APIs, and data sources as part of its response flow.
Yes — the Pareto 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 Pareto to your app for free
Developers can integrate Pareto for free using the Puter.js AI API.
With the User-Pays Model, each user covers their own AI usage instead of the developer.