I'm not sure what you're asking, but it seems you're not aware of the huge AI model field where various AI models are already being publicly shared and adjusted? It doesn't need piracy to see or have alternatives.
The key to hosted services like ChatGPT is that they offer an API, a service, they never distribute the AI software/model.
Other kinds of AI gets distributed and will be pirated like any software.
Considering piracy "around" them, there's an intransparent issue of models being trained on pirated content. But I assume that's not what you were asking.