Arcee AI

AI · Open-Weight Models · Foundation Models

Funding

Arcee AI raises $150M Series B, tops $1B valuation for open models

Training four frontier-scale models for roughly $20 million shows open-weight AI no longer needs billion-dollar budgets to rival China.

• Arcee AI closed a Series B led by Vista Equity Partners, Cambium Capital, and Emergence Capital, valuing the open-weight AI startup at more than $1 billion, with the raise reported at roughly $150 million.
• Founded in 2023, Arcee builds frontier open-weight foundation models, including the 400-billion-parameter Trinity Large, letting enterprises and government agencies run and own state-of-the-art AI without sending data to closed providers like OpenAI or Anthropic.
• Arcee trained its entire 2025 model lineup, including Trinity Large, for approximately $20 million using about 2,048 Nvidia Blackwell B300 GPUs over roughly six months.
• Trinity Large is described as the first frontier-scale, permissively licensed open-weight model built end-to-end in the U.S. since Meta halted new Llama releases in early 2025.
• The funding will expand Arcee's collaboration with the U.S. Department of Energy and its national laboratories on open models for scientific computing, alongside a new suite of open-model products.
• The round signals that capital-efficient training pipelines are letting smaller labs compete at the frontier just as U.S. policymakers push open-weight models as a counter to Chinese open-source dominance.