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Fortune
Fortune
Allie Garfinkle

OpenAI's reported $500 billion valuation signals AI euphoria

Photo of Sam Altman (Credit: Chip Somodevilla—Getty Images)

A big week for OpenAI is a big week for AI. 

And this week saw the Sam Altman-led company unveil its long-awaited GPT-5, along with a sweeping U.S. government partnership. There’s also a key number now in the mix: $500 billion, the reported new valuation OpenAI is set to hit amid a share sale. 

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