In an interview with reporters from multiple publications on Thursday night, OpenAI CEO Sam Altman said he believes the AI sector has entered the territory of a financial bubble.

As economists speculate whether the stock market is in an AI bubble that could soon burst, OpenAI CEO Sam Altman has just admitted to believing we’re in one. “Are we in a phase where investors as a whole are overexcited about AI?” Altman said during a lengthy interview with The Verge and other reporters last night. “My opinion is yes.”