Arcee AI Raises $150 Million at $1 Billion Valuation to Build Open-Weight Enterprise Models

Arcee AI has raised at least $150 million in a Series B round at a $1 billion pre-money valuation, giving the U.S. open-weight model startup fresh capital to expand its model-building effort and enterprise platform. The financing, reported after the company trained a family of open-weight models for roughly $20 million, positions Arcee as a newly minted AI unicorn pursuing a lower-cost alternative to proprietary frontier labs.