That thing is yet to be invented, and when it does i will buy it for sure.
There are some programs that gather a lot of snippets and phrases and combine them to create something that might be readable but probably not very good for tier 1 honestly, kontent kaboom or seo content machine tier1 module, can be good to achieve that, about word AI, really is just a fraud, you can spin articles that are readable but not unique at all or the opposite, so if you can do something with that output, it would be nice but it will require some work.