4k ControlNet Upscaler — v1.0

Refiner with AI prompting (Gemini 2.0) and upscaler up to 4k, including Reactor nodes for FaceSwap.

Upload an image and have Gemini 2.0 extract a Flux prompt from that image. The Flux prompt will then be used to refine the image. After that it will go through 1 (2k upscale) or 2 (4k upscale) upscalers.

Use any Flux model, and use high steps in the refiner for high details (lower amount of steps for lower details).

COMMON ERROR

If you get an API error from the Gemini Flash 2.0 node, but know that you have a valid API, check the inputs to the node. For some reason there has to be an actual input in all the nodes inputs, even if you aren't using them. Just upload whatever mp4 clip and mp3 clip you have to the nodes that are hidden behind the Gemini Flash 2.0 node. Some times you might have to also restart Comfy, or clear the cache from Gemini Flash 2.0 node in some other way in order to get it to work.