India, Oct. 27 -- AI giant Anthropic filed papers Monday for what could be the biggest initial public offering of stock ever even as its CEO warns advanced AI could pose an existential threat to humanity. The 335-page document showed Anthropic's revenue is growing rapidly, but has yet to turn a profit. The Claude chatbot maker reported a net loss of $80.7 billion in the first half of 2026. Still, Anthropic, valued earlier this year at $965 billion by private investors, is reportedly set to see that value rise to $1.5 trillion or possibly $2 trillion. The document also has a 100-odd-page list of "risk factors." These include the prospect of "malicious actors" using AI models to build chemical weapons and the possibility Anthropic's AI models could "pose catastrophic or existential risks to humanity."P11...