TLDR Tech / AI
Trinity-Large-Thinking: Scaling an Open Source Frontier Agent
Trinity-Large-Thinking is a frontier open reasoning model for complex, long-horizon agents and multi-turn tool calling. It is likely the strongest open model yet to be released outside of China. During training, the Arcee team focused on the things that make agents feel real in practice: staying coherent across turns, using tools without getting sloppy, following instructions under constraint, and keeping quality high without making the economics absurd. Trinity-Large-Thinking is available through Arcee's API, and the weights are available on Hugging Face under Apache 2.0.
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