Anthropic hit B ARR in 16 months. I went looking for where the money is actually coming from.

A revenue chart that goes vertical does not tell you who pays. It tells you who gets charged. A friend who runs infrastructure at a 200 person SaaS company called me on Monday. He had just gotten the quarterly bill from his AI vendor through an enterprise contract. He told me the number. I asked him to repeat it. The number ran high. Not "we are building a foundation model" high. High enough that he had a week of his life mapped out to write a proposal to bring some of the workloads on prem so t