The major counterpoint here is commoditization; you may have the market growing and models becoming cheaper at the same time. And we don't even have to look to Chinese models for that, as OpenAI has been adjusting its pricing already. For profitability, Anthropic still seems to be pretty dependent on its current price levels.
That said, I'm also somewhat skeptical that there is even much room for growth left unless somebody finds a new, important, and token-hungry use case.
Generating a full length movie script and then the video?
I believe that the value that OpenAI and Anthropic hold, in light of stiff competition from China, is not their products but their internal models. China’s work is all derivative of American model API access. The exponential RSI loop means that as long as Anthropic and OpenAI keep steady footing and only release older models they will will always be the best on the market and all others will be in their tailwinds. These two things combined are what make me believe OpenAI and Anthropic will hold value and grow as companies.