Business

Open AI reinstated Sam Altman as chief executive, just days after he was ousted, and created a new board of directors. The turmoil at the startup that developed the ChatGPT chatbot shook the artificial-intelligence industry. The reasons behind the sacking are still unclear, but are thought to have reflected a disagreement over the speed of the AI revolution. Almost all of OpenAI’s staff threatened to quit if Mr Altman was not brought back. Microsoft, which owns a 49% stake in the firm, had offered to employ him. Larry Summers, an éminence grise and former American treasury secretary, will sit on the new board.