Arcee AI: Trinity Large Thinking

arcee-ai/trinity-large-thinking

Try Trinity Large Thinking 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: "arcee-ai/trinity-large-thinking"
}).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: "arcee-ai/trinity-large-thinking"
        }).then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

Model Card

Trinity Large Thinking is a 398-billion-parameter sparse Mixture-of-Experts reasoning model from Arcee AI, with approximately 13B active parameters per token, post-trained with extended chain-of-thought and agentic reinforcement learning.

It generates explicit reasoning traces in thinking blocks before final responses, and its 262K context window accommodates long agentic reasoning chains. Benchmark results include 94.7% on τ²-Bench and 98.2% on LiveCodeBench, placing it at #2 on PinchBench behind only Claude Opus 4.6.

Released under Apache 2.0, Trinity Large Thinking is the strongest option in the Trinity family for agentic pipelines, long-horizon planning, complex multi-step coding, and tasks that benefit from transparent reasoning traces.

Context Window 262K

tokens

Max Output 80K

tokens

Input Cost $0.25

per million tokens

Output Cost $0.9

per million tokens

Release Date Apr 1, 2026

Try Trinity Large Thinking for free

Try Trinity Large Thinking instantly in your browser.
This playground uses the Puter.js AI API — no API keys or setup required.

Chat arcee-ai/trinity-large-thinking

Chat with Trinity Large Thinking

Frequently Asked Questions

How do I use Trinity Large Thinking?

You can access Trinity Large Thinking by Arcee AI 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.

Can I try Trinity Large Thinking for free?

Trinity Large Thinking 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.

Is the Trinity Large Thinking API free for developers?

Trinity Large Thinking 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.

What is the pricing for Trinity Large Thinking?

Trinity Large Thinking costs $0.25 per 1M input tokens and $0.9 per 1M output tokens.

	Price per 1M tokens
Input	$0.25
Output	$0.9

Who created Trinity Large Thinking?

Trinity Large Thinking was created by Arcee AI and released on Apr 1, 2026.

What is the context window of Trinity Large Thinking?

Trinity Large Thinking supports a context window of 262K tokens. For reference, that is roughly equivalent to 524 pages of text.

What is the max output length of Trinity Large Thinking?

Trinity Large Thinking can generate up to 80K tokens in a single response.

Does it work with React / Vue / Vanilla JS / Node / etc.?

Yes — the Trinity Large Thinking 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 Trinity Large Thinking to your app for free

Developers can integrate Trinity Large Thinking for free using the Puter.js AI API.
With the User-Pays Model, each user covers their own AI usage instead of the developer.

Get started How pricing works