The co-founder of ChatGPT developer OpenAI, Ilya Sutskever, is leaving the company, he announced on Tuesday. The company’s trajectory had been “nothing short of miraculous,” Sutskever wrote on X. “I am excited for what comes next — a project that is very personally meaningful to me about which I will share details in due time.” Sutskever was one of the members of OpenAI’s board of directors who fired Sam Altman from his position as chief executive, and dropped him from the board. Altman returned to the top job a few days later after protests from employees. Sutskever also changed his mind and …