This guy helped create ChatGPT. His new startup is in talks at a $10 billion valuation. Meet Diogo Almeida. He worked at Google Brain. He worked at OpenAI. He was a co-author on the RLHF training paper behind ChatGPT. Then he left. He spent two years in stealth with his co-founders, Erik Gafni and Sasha Sheng, on a $40 million seed led by DCVC at a $200 million valuation. On September 15, they finally came out of stealth and launched their first model, Jev. The launch video has 38…