OpenAI Valuation Today (Dec. 14, 2025): The $500 Billion Benchmark, $600B Secondary Signals, and the New Money Questions Investors Are Asking
OpenAI’s latest employee share sale set its valuation at $500 billion this fall. As of December 14, 2025, secondary market data pegs it near $500 billion, while some private trades and proxy estimates suggest figures as high as $600 billion and $750 billion. The company faces scrutiny over whether its business model can sustain mounting infrastructure costs.