I'm not sure what you mean. Nightcafe 'updated' their SDXL model to 1.0, but they made it so you have to subscribe on a paid tier to use it. They gave out 10 free generations; although I admit I've only tried it twice, I'm not impressed with how it turned out compared to the free .9 model they released a while ago.
sdxl is the base model. for example, dreamshaper is a finetuned model with sd 1.5 as its base.
finetuning is where the magic happens. right now there's only the base sdxl model
SDXL .9 vs SDXL 1.0