Fear of missing out has rocketed the value of artificial intelligence companies, despite few signs as to when the technology will turn a profit, raising talk of AI overenthusiasm.

The mystery deepens when it comes to predicting which generative AI firms will prevail, according to analysts.

ChatGPT-maker OpenAI secured $6.6 billion in a funding round that propelled its valuation to an eye-popping $157 billion, sparking new worries there is an AI bubble poised to burst.