Microsoft’s vice president of GenAI research, Sebastien Bubeck is joining OpenAI. The development follows a series of departures from OpenAI, including that of longtime chief technology officer Mira Murati in September.Microsoft’s vice president of GenAI research, Sebastien Bubeck is joining OpenAI. The development follows a series of departures from OpenAI, including that of longtime chief technology officer Mira Murati in September.