Elon Musk has urged major AI research groups and Chinese companies to test each other's models. He delivered that message while some people in the technology industry want a slowdown in AI work. Musk himself has major AI investments. Tesla stock fell after his remarks. Musk also was listed at the peak of Forbes' yearly list of the wealthiest Americans. He again raised the idea of combining Tesla and SpaceX. In a separate development, reports say sexually abusive imagery of children continues on X, even though Musk committed to fixing it.