Microsoft's AI business crossed $37 billion in annual revenue run rate in the quarter ended March 2026, up 123 percent year on year, according to the company's earnings disclosures filed with the SEC. Two months later, the executive who built that business was running a sustained public argument that concentrating AI's gains in "a few models" is not merely bad economics; it is politically untenable.
From Champion to Critic: How the OpenAI Arc Turned
Microsoft's formal relationship with OpenAI began in 2019 with a $1 billion investment. A $10 billion follow-on in January 2023 gave Microsoft exclusive Azure distribution rights for OpenAI's models and locked in a revenue-sharing arrangement. At the time, Nadella publicly described OpenAI's technology as among the most significant he had encountered in his career. Microsoft's stock and its narrative both benefited from the association.
