The biggest companies in the world are spending billions and billions on AI — specifically on "large language models" like the kind that power the likes of ChatGPT , Google's Gemini, and Meta's Llama. That's a mistake, says the man who, until recently, headed Meta's AI push . "LLMs are great, they're useful, we should invest in them — a lot of people are going to use them," said Yann LeCun, who's still an AI researcher at Meta for the moment, speaking at an event in Brooklyn Sunday night. "They