Arguably nothing even has to change with training for this to be sustainable. Dario has claimed that Anthropic is profitable on a per training run basis. They aren't profitable because they choose to keep investing in increasingly large training runs.
Cut the crap.
The value of the firm's operating assets = EBIT(1-t) - Reinvestment
You (Anthropic) want that sky-high valuation? Accept reinvestment is part of the equation.
If they decide to stop reinvesting, then they are as good as dead.
Moreover, they clearly are not re-investing cash flows from operations. Why do you think they are continually raising money? Lmao.