This week, Amazon completed the second phase of a deal announced last September, when it committed to investing up to $4 billion in OpenAI rival Anthropic. The additional $2.75 billion invested is Amazon’s largest check ever into another company and yet another signal of how critical the development of large language models has become to Big Tech. The logic is simple: Amazon needs to offer models through AWS that compete with the OpenAI-powered offerings of its arch cloud rival, Microsoft, and A...