Elon Musk's artificial intelligence start-up xAI says it is working to remove "inappropriate" posts made by its chatbot, Grok, after users shared how it made positive references to Hitler. Screenshots published on social media show the chatbot saying the Nazi leader would be the best person to respond to alleged "anti-white hate."

ADL, the non-profit organization formed to combat antisemitism, urged Grok and other producers of Large Language Model software that produces human-sounding text to avoid "producing content rooted in ...