4o generates new images that try to be close but not exact it doesn't edit existing ones so wouldn't be much use for this.

I think it's because Geminis nano banano is better than 4o imagegen at creating and editing images from instructions

Valid question, as they already have a partnership with OpenAI to use ChatGPT in Siri. I personally use GPT for illustrations and Nano Banana for photo edits (Midjourney for realistic photos).

As an aside, perhaps they're using GPT/Codex for coding. Did anyone else notice the use of emojis and → in their code?

Someone here shared an interesting comparison of models performances, and Gemini does seem much better

https://genai-showdown.specr.net/image-editing

Gemini is better. See results of double-blind evaluation here:

https://lmarena.ai/leaderboard/image-edit

Because GPT-4o is too orange (literally).

Someone who works in AI told me they think that was trained in as a "watermark", apparently the same is true with the em-dashes, to "ease people into AI" or something.