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How does generating images with 90% less pixels count as beating DALL•E?

There are plenty of models around that will reliably upscale an image. That's not the hard part.

Even the latest AI up scalers will have a 384x384 look pretty terrible when put against e.g SDXL @ 1024x1024 native. It's just too little to work on.

I think they're referring to specific benchmarks