Unbiased: Pareto 26.9
unbiased/pareto-26.9
Try Pareto 26.9 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: "unbiased/pareto-26.9"
}).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-26.9"
}).then(response => {
document.body.innerHTML = response.message.content;
});
</script>
</body>
</html>
Model Card
Pareto 26.9 is a blended AI model from Unbiased AI, the platform of Circuit & Chisel, a remote-first team in the US and Canada. It runs several frontier and open models on each request and returns one answer. It does not switch models within a conversation, so prompt caching still applies.
On Unbiased's published scores, Pareto 26.9 gets 74 on DeepSWE, 88 on ArXivMath, and 78 on MMMU-Pro. It scores 51 on Terminal-Bench 4.0 and 49 on Humanity's Last Exam without tools, which are below the frontier models. Because the underlying model mix can change between releases, scores cannot be attributed to a single model.
It supports tool calling and has a 262,144-token context window with up to 131,072 output tokens. It suits coding and agent workflows that need consistent behavior 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 Oct 13, 2026
Try Pareto 26.9 for free
Try Pareto 26.9 instantly in your browser.
This playground uses the Puter.js AI API — no API keys or setup required.
More AI Models From Unbiased
Frequently Asked Questions
You can access Pareto 26.9 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 26.9 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.
Pareto 26.9 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 26.9 was created by Unbiased and released on Oct 13, 2026.
Pareto 26.9 supports a context window of 262K tokens. For reference, that is roughly equivalent to 524 pages of text.
Pareto 26.9 can generate up to 131K tokens in a single response.
Yes, Pareto 26.9 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 26.9 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 26.9 to your app for free
Developers can integrate Pareto 26.9 for free using the Puter.js AI API.
With the User-Pays Model, each user covers their own AI usage instead of the developer.