Group 1 - Meta has hired several researchers from OpenAI, including Trapit Bansal and four others: Shengjia Zhao, Jiahui Yu, Shuchao Bi, and Hongyu Ren [1][2] - This hiring spree follows the launch of Meta's Llama 4 AI models, which did not meet CEO Mark Zuckerberg's expectations [2] - OpenAI CEO Sam Altman indicated that Meta was offering substantial signing bonuses, reportedly around $100 million, but noted that none of OpenAI's top talent had left [2] Group 2 - Meta's CTO Andrew Bosworth clarified that while senior leaders may have received high offers, the actual terms were more complex than just a signing bonus [2]