**Trinity Large Thinking:** Now available on OpenRouter.

[Try now ↗](https://openrouter.ai/arcee-ai/trinity-large-thinking)

# About Arcee AI

Arcee AI builds open-weight foundation models that run anywhere - on edge, on prem, or cloud. Our Trinity family standardizes capabilities across sizes and is released under Apache-2.0.

What you build today runs tomorrow.

## Backed by

## Our Story

Arcee AI is a U.S. model lab led by builders. We began in post-training, then moved upstream to pre-train our own models because we believe progress won’t be defined by size, but by efficiency, adaptability, and the ability to own what you build.

That belief produced Trinity. Our first family of foundation models with consistent skills from on-device to cloud. We optimize for performance per parameter and release weights under Apache-2.0. Every model we ship is permanent and portable, so there’s no lock-in and no forced upgrades. We’re investing to make open weights the durable standard: curated + synthetic data pipelines, reliability measured on tool use and structured outputs, and a commitment to open-weight R&D. The goal is simple: a permanent, practical foundation for AI that is efficient to serve, trustworthy to scale, and ready for real products.

## The People Behind Arcee

We’re a small, dynamic team with outsized impact. No layers, no red tape, just brilliant people building together. Our team blends deep AI research experience with hard-won expertise in deploying solutions. We see the big picture while executing the smallest details.

Mark McQuade

CEO @ Arcee

Every day at Arcee, I’m reminded how lucky I am to work with such talented teammates. It’s a space where big ideas and great people come together.

Molly Niland

Chief of Staff @ Arcee