The Information has the story. The outlet says Research director Jakub Pachocki, AI risk evaluation head Aleksander Madry, and longtime researcher Szymon Sidor resigned following Sam Altman’s surprise firing yesterday.

The article notes that Pachocki and Sidor had worked with Greg Brockman (who also left the company yesterday) on OpenAI’s Dota 2-playing AI bot, while Madry joined the company in May 2023, later forming a team to mitigate AI risks.