Trinity Large is live in Kilo!
Arcee's new release is a massive open-weight model from a US lab
The open-source landscape just shifted, and we’re bringing the cutting edge directly to your workflow. Arcee AI just released their latest model, and Trinity Large is already available in Kilo Code—you can start building with it today, 100% for free.
Trinity Large is a powerhouse:
A 400B parameter sparse MoE foundation model
13B active parameters per token
256 total experts, with 4 experts active per token
Trinity models are turning heads in the open-source developer community
Here is what makes this launch a major event for the OSS community:
Trinity Large is the largest open-weight model ever released by a US-based lab. By offering state-of-the-art capabilities previously restricted to proprietary giants, it sets a formidable new benchmark for accessible, high-performance AI.
What’s the big deal?
Built for Coders: With a massive context window and exceptional reasoning efficiency, Trinity Large excels at maintaining context across large codebases, making it an incredible asset for complex refactoring and architecture planning.
Massive Training: Trinity Large was trained on 2048 B300 GPUs, and Trinity’sMoE layers follow the DeepSeekMoE (Mixture of Experts) design, but with a unique twist (read more in The Trinity Manifesto).
Catching Up to the Competition: Crucially, this massive deployment represents a vital strategic move, with Arcee’s models catching up to OSS heavyweights like Z AI, Qwen and DeepSeek.
Trinity Large is the crown jewel of Arcee, a US-based open intelligence lab founded in 2023. With backers including Flybridge, Samsung, and Emergence Capital, the Arcee team has consistently championed the open-source movement, focusing on extreme efficiency and developer ownership. It’s a philosophy that we share at Kilo.
What’s Next?
We know you want to see how Trinity Large performs on real-world coding benchmarks. We are currently running the new model through our standard internal gauntlet—including boilerplate generation, debugging, and complex refactoring tasks. We’ll be sharing the full stats, results, and a deep-dive analysis in a future post.
In the meantime, share your thoughts with us on X and Discord.
Get Started
Why wait for the post-preview benchmarks? You can experience the raw power of the largest US open-weight model right now.
The preview release of Trinity Large is available totally free for all users in Kilo Code. Update to the latest version of Kilo, select Trinity Large from the model dropdown, and start shipping.