On July 8, Grok let loose a barrage of antisemitic phrases, attacked users with traditionally Jewish surnames, and began referring to itself as "MechaHitler."

Hours later, on Wednesday, X CEO Linda Yaccarino resigned from the company after just two years at the helm, though it wasn’t immediately clear whether her departure was related to the Grok issue.

Later that day, a post on Grok’s X account stated that the company was taking steps to address the problem. “We are aware of recent posts made by Grok and are actively working to remove the inappropr...