Hi.
Topaz Gigapixel AI:
Simple answer, Gigapixel AI was a Perpetual License version meaning no subscription and has now been discontinued and is no longer available for purchase.
However, if you have owned Topaz Gigapixel AI previously then you might be able to upgrade to the final version of Topaz Gigapixel AI 8.4.4 but, you will have to politely ask Topaz Support if that’s an option
Here’s the link for Topaz Support
Topaz Support
Topaz Gigapixel Studio version:
Topaz Gigapixel is the new version moving forward which is Subscription only here’s the link for more information about Topaz Gigapixel
Here’s the link for the Subscription options
Hope this helps
i have subscription of topaz gigapixel …so is there something extra with AI … should i buy AI subscription also
There is no Topaz Gigapixel AI Subscription it has been discontinued and you can not buy or Subscribe to it
Your Topaz Gigapixel Subscription is the new version and has all the features of the old plus a lot more
Hello!
Our September transition marks a fork in the road between the legacy & studio apps.
Moving forward, new models and features will only be added to the studio releases of apps under a subscription model.
You’ll continue to have access to your owned legacy apps that you purchased licenses for.
The legacy licensed release will appear as “Gigapixel AI” with version numbers like v.8.x.
The studio subscription release of “Topaz Gigapixel” will have version numbers like v1.x.
“Topaz Studio” is not a product, but a suite of products under our subscription tiers.
Topaz Studio includes the Desktop Collection and Cloud Collection of apps.
Our new Pricing page shows the studio collection info.
You can view the details for your account on our new Account page.
Enjoy 
