Photoshop can now use third-party AI for Generative Fill. But what is each model best for, and when should you switch from Firefly to Nano Banana or Flux?

Generative Fill before and after.

Adobe Firefly is behind a number of key Photoshop updates – but a key change for the photo editing giant in 2025 is the ability to choose third-party AI models. Photoshop now allows users to use Nano Bana Pro or Flux.2 AI image generators instead of its own Firefly for Generative Fill. But that, of course, begs the question – when should photo editors use a third-party AI model?

I directed exactly that question to not just a Photoshop expert but Adobe Photoshop’s Senior Director of Product Management, Stephen Nielsen. Here’s when (and why) photo editors may want to try a third-party AI.