From first principles I think youre right, but also Anthropic is making something like 80% margins.
I'm skeptical that they are operating at anything but a loss. 80% margins on a specific product (API) might still not cover the losses on the other products (Free tier, subscriptions) and their expenses (operating costs, training, research, etc).
They have a lot of cash, but very few assets and a voracious hunger for renting compute.
Don't get me wrong, they make a fantastic model, but the business success is yet to be seen.
Where did you read this? I though it was a confidential filing (but I am open to receiving links to the S-1 that was filed).