Elon Musk’s artificial intelligence start-up xAI says it is in the process of removing "inappropriate" posts by Grok on X, the social media site formerly known as Twitter, after users pointed out the chatbot repeated an antisemitic meme and made positive references to Hitler.

Grok made multiple positive references to Hitler this week when queried about posts that appeared to celebrate the deaths of children in the recent Texas floods.

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 ...