Does Photoshop includes AI in any plan ?

The $ 10 a month Photography Plan (20 GB cloud storage) is still available, but you have to look specifically for it. They try to promote the $ 20 plan instead, with 1 TB cloud storage.

In any case, every available option is the full complete Photoshop, with all features.

https://commerce.adobe.com/store/commitment?items%5B0%5D%5Bid%5D=1E47D777E75D45CD12BE910FD7EEEC6E&cli=adobe_com&co=NO&ctx=fp&lang=en&apc=undefined 

4,79? What’s that for? 

19,99 seems to be the cheapest one here: 

https://www.adobe.com/products/photoshop/plans.html#

As for Generative Credits please see these pages: 

https://community.adobe.com/t5/photoshop-ecosystem-discussions/photoshop-what-you-need-to-know-about-generative-credits/td-p/14185311

https://helpx.adobe.com/firefly/using/generative-credits-faq.html