Elon Musk is pressing top AI labs and Chinese companies to test each other's models. He issued the request while some in tech want a slowdown in AI work. Musk himself has major AI investments. Tesla shares fell after the appearance. Musk also featured at the peak of Forbes' yearly list of the wealthiest Americans. He repeated the notion of joining Tesla and SpaceX. On another front, reports say child sexual abuse material continues on X, even though Musk committed to fixing it.