Meta's open-source Llama models helped define the company's AI strategy. Yet the researchers who built the original version have mostly moved on. Of the 14 authors credited on the landmark 2023 paper that introduced Llama to the world, just three still work at Meta: research scientist Hugo Touvron, research engineer Xavier Martinet, and technical program leader Faisal Azhar. The rest have left the company, many of them to join or found its emerging rivals.Meta's brain drain is most visible at Mistral, the ...