Introducing AuraSR - An open reproduction of the GigaGAN Upscaler
Today we are releasing AuraSR, a 600M parameter upsampler model derived from the GigaGAN paper. This model can upscale low-res images to 4x the resolution, and can be applied repeatedly. We are publishing this model under a truly open source license.

AuraSR excels in upscaling images generated by text-to-image models. This model does not have any limitations on resolution or upscaling factor.
https://blog.fal.ai/introducing-aurasr-an-open-reproduction-of-the-gigagan-upscaler-2/