A tech titan and a buzzy AI startup are fighting over exactly how much purchasing power an AI agent should have. Perplexity, an $18 billion AI startup that makes the buzzy AI web browser Comet, published a blog post on Tuesday saying that it had received a legal threat from Amazon. "This week, Perplexity received an aggressive legal threat from Amazon, demanding we prohibit Comet users from using their AI assistants on Amazon. This is Amazon's first legal salvo against an AI company, and it is