I work in a domain of applying AI to specific enterprise domain. It's not like you can crawl our data in the open web. Getting any data from clients is years of lawyer struggles and chicken and egg problems to solve. Fine-tuning models to client expectations - they are not going to go through the process again with someone else.
And moat in B2C AI is owning tons of your personal data and habits that Google and Facebook do. It's just not trully utilized with GPT models yet.
Instead, the best moat is to know that your product isn't a thin replicable wrapper for ChatGPT but instead has a large surface area, with lots of well-built features. Continue building those features at a fast pace, and you can win.
The new AI platform may over time enable more products than even the shift to mobile.
ADDED:
What's implied is that the moat could be built and some kinds of moats are not yet well-known or prevalent. Proprietary data is often mentioned. But also the application on top of LLMs (or LFMs) needs not be just a thin layer with little technical barrier.