The baton of open source AI models has been passed on between several companies over the years since ChatGPT debuted in late 2022, from Meta with its Llama family to Chinese labs like Qwen and z.ai. But lately, Chinese companies have started pivoting back towards proprietary models even as some U.S. labs like Cursor and Nvidia release their own variants of the Chinese models, leaving a question mark about who will originate this branch of technology going forward. One answer: Arcee, a San Francisco based lab, which this week released AI Trinity-Large-Thinking—a 399-billion parameter text-only reasoning model released under the uncompromisingly open Apache 2.0 license, allowing for full customizability and commercial usage by anyone from indie developers to large enterprises. The release represents more than just a new set of weights on AI code sharing community Hugging Face; it is a strategic bet that “American Open Weights” can provide a sovereign alternative to the increasingly closed or restricted frontier models of 2025. This move arrives precisely as enterprises express growing discomfort with relying on Chinese-based architectures for critical infrastructure, creating a demand for a domestic champion that Arcee intends to fill.As Clément Delangue, co-founder and CEO of Hugging Face, told VentureBeat in a direct message on X: “The strength of the US has always been its startups so maybe they’re the ones we should count on to lead in open-source AI. Arcee shows that it’s possible!” Genesis of a 30-person frontier labTo understand the weight of the Trinity release, one must understand the lab that built it. Based in San Francisco, Arcee AI is a lean team of only 30 people. While competitors like OpenAI and Google operate with thousands of engineers and multibillion-dollar compute bud …
