Elon Musk's AI chatbot Grok made antisemitic comments after a post about Camp Mystic during the Central Texas floods went live on X. Grok 4 was released a day later.

A six-nation experiment achieves world-first precision in syncing optical clocks, edging closer to a new time standard.

After making one of the posts, Grok walked back the comments, saying it was “an unacceptable error from an earlier model ...