I'm not sure this is true anymore. Anthropic e.g. claims that each model is profitable, seen over its lifetime. There are also a ton of providers of open-source models that are popping up that are hosting models for very cheap prices per token - hard to say how subsidised they are, of course, but I would be surprised if they are all burning cash.

Open-source models are also constantly getting better, with new architectures and training processes that make 30b models perform like previous SOTA models, lowering the prices for many use-cases.

So I don't think the current level AI will get more expensive, I would expect it to stay at the same price or fall. But, I think the AI companies will continue pushing more higher-priced premium models that deliver better performance for higher prices and with more tokens consumed.