On November 21, several important stories emerged on the New York Times business pages. One of these stories centered on Microsoft and the turmoil at OpenAI, a small but influential artificial intelligence start-up that developed the ChatGPT chatbot. This development caused Microsoft’s shares to reach a new high. In another story, X, the social media service formerly known as Twitter, filed a lawsuit against Media Matters in federal court after research by the organization showed that ads on X appeared next to antisemitic content.

In addition to these stories, Epic Games’ CEO Tim Sweeney testified in a San Francisco federal courthouse as part of the company’s ongoing legal battle against Google. Meanwhile, the future of OpenAI hung in the balance after more than 700 of its 770 employees signed a letter indicating their intention to leave for Microsoft if former CEO Sam Altman was not reinstated.

Overall, these events provided a diverse range of topics and perspectives for business coverage on this day.