The numbers are certainly audited by their investors. Anthropic isn't foreign to PR talk, but investors know what to look for in their book. They aren't stupid unlike how they are viewed on HN.
There are more investment money than Anthropic need. They can pick and choose.
I do, and I do trust the numbers. I doubt Anthropic is pursuing fraud given that they already don't have enough compute to serve demand. What is the point of lying to the public, investors and risk going to jail?
There are more investment money than Anthropic need. They can pick and choose.