The CEO of ChatGPT developer OpenAI, Sam Altman, has been reinstated on the board of directors almost four months after the company briefly fired him, then rehired him. On Friday, Altman was reappointed to OpenAI’s board of directors, which determines the strategy of the developer of artificial intelligence software. In November members of the previous board of directors had fired Altman from his position as CEO, and dropped him from the board – but he was returned to the top job a few days later after protests from employees. An investigation found that there were no compelling reasons to dis…