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American lab building open-weight Trinity models
Updated
Arcee AI is an American research lab building open-weight AI models under the mission of Building Open Intelligence. Its main line is the Trinity family, and its models can be inspected, fine-tuned and deployed independently.
You can call Arcee models through its API with an API key, or download open-weight models to fine-tune and host yourself. A free chat interface lets you try the models first. Documentation is at docs.arcee.ai.
Developers and enterprises that want open-weight models they control. Arcee reported raising Series B funding in September 2026 at a $1 billion valuation.
The Arcee homepage does not list prices or an explicit license. A free chat interface is available, and the API requires a key.
Alternatives include Nous Research for open models, Prime Intellect for decentralized training and Unsloth for fast fine-tuning.
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