Book excerpt: "Empire of AI" by Karen Hao

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Tech journalist Karen Hao's new book, "Empire of AI: Dreams and Nightmares in Sam Altman's OpenAI" (published by Penguin Press), examines the Silicon Valley billionaire and his advocacy of artificial intelligence, which tech entrepreneur Elon Musk himself has called the "biggest existential threat" to humanity. [Musk has simultaneously promoted his own artificial intelligence company, xAI, and chatbot, Grok.]

Read an excerpt below.