Have you tried launching a new app? Check if you have access to Gemini 3. I can imagine you might not have access to it at all.
I just went through my oldest apps and Gemini 3 is available everywhere.
I tried and yes, i just can create new app with Gemini 3. I saw some little differensies in UI between 2.5 and 3.0 too. Like other color of chatbox ant etc. So my guess its like somehow my app with 2.5 is on older version of overall aistudio?
I´m not sure, or perhaps it’s because you’re using an old AI in your app? Another attempt would be to download your app, start a new Gemini 3 build chat, immediately cancel it, and then import your app there.
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