AI is a remixer; it remixes all known ideas together. It won't come up with new ideas though; the LLMs just predict the most likely next token based on the context. That means the group of characters it outputs must have been quite common in the past. It won't add a new group of characters it has never seen before on its own.

https://news.ycombinator.com/item?id=47497757#:~:text=AI%20is%20a,on%20its%20own.