Silicon Valley is spending billions on AI tokens and nobody can agree if it's working Business InsiderCorporate America enters its AI reckoning AxiosMicrosoft reports are exposing AI's real cost problem: Using the tech is more expensive than paying human employees FortuneUber's COO says it's getting harder to justify the money spent on AI tokenmaxxing Business InsiderUber president says AI spending is getting ‘harder to justify' The Verge