Confirmed by a second news source https://www.semafor.com/article/11/17/2023/openai-board-fires-sam-altman https://www.semafor.com/article/11/17/2023/openai-boa

Confirmed by a second news source https://www.semafor.com/article/11/17/2023/openai-board-fires-sam-altman https://www.semafor.com/article/11/17/2023/openai-board-fire... "Microsoft, which has invested billions in OpenAI, was blindsided by Altman’s firing, Axios reported and Semafor confirmed."