The relationship between Elon Musk and Sam Altman progressed from an initial friendship to a bitter rivalry. Here's why.

Last March, Musk filed a lawsuit claiming OpenAI, a global leader in artificial intelligence innovation which has developed the ChatGPT chatbot, DALL-E image generator and other advanced AI-driven tools, breached promises made in its founding documents and prioritizes profit motive over serving the public good.

After helping President Trump get elected, Elon Musk was poised to dominate the country’s AI policies. Then Mr. Altman sneaked into the White House.