An executive for ChatGPT maker OpenAI said in court testimony on Tuesday that the AI model developer expects to burn $50 billion on computing power before the end of the year. Cofounder and president Greg Brockman threw out the number, which was previously reported by Bloomberg, during OpenAI's closely watched legal battle with hype-fiend Elon Musk. If it wasn't obvious, that would be $50 billion of someone else's money. Nearly four years after ChatGPT kicked off the AI boom, OpenAI's leadership hasn't yet figured out how to turn a profit. Heck, the company can't even manage to hit its own revenue targets, if recent reports are to be believed. That hasn't stopped CEO Sam Altman from talking the likes of Microsoft, Amazon, SoftBank, Nvidia and others into issuing press releases claiming plans to invest tens of billions of dollars into his quest for AGI. (Or was it AI superintelligence?…