Previous gpt image models could (when generating, not editing) but gpt-image-2 can't.

Noticed it earlier while updating my playground to support it

https://github.com/alasano/gpt-image-playground

Works for me, but really weirdly on iOS: Copying to clipboard somehow seems to break transparency; saving to the iOS gallery does not. (And I’ve made sure to not accidentally depend on iOS’s background segmentation.)