Sam Altman, boss of OpenAI, returned to the board of directors of the company he co-founded on Friday March 8. The thirty-year-old was abruptly fired in mid-November by the former board, then rehired a few days later.

Last week, Elon Musk, one of Open AI's co-founders, filed a lawsuit against the company, accusing Sam Altman and current management of having "betrayed" its original mission. He particularly criticizes OpenAI for its partnership with Microsoft, which has invested some $13 billion in the company.