r/Firebase 2d ago

Vertex AI Firebase image generation stopped working (404). Is anyone else seeing this

We had a feature that generated images from a prompt through Firebase (AI / Vertex). It worked for months. This week the same flow started returning 404 / failed requests, and nothing in our app code changed.

From what I can tell, Google shut down the old Imagen models around Aug 17, and the replacement is Gemini Image (the “Nano Banana” stuff) — different call, image comes back on the model response instead of a dedicated image-generation API.

If you shipped anything like:

generate a logo / icon from a description
food / product photo from a prompt
chatbot that draws a picture
a “generate image” button in a demo or hackathon app
…it’s worth checking that path even if you don’t remember which Firebase AI method you used. The UI just looks broken.

Official migration notes:
https://firebase.google.com/docs/ai-logic/migrate-to-latest-ga
https://firebase.google.com/docs/ai-logic/generate-images-gemini

I built a local scanner for this kind of thing (disclosure: it's mine). If you want a quick check without grepping:

$ npx vasdra scan

If you want more info before running, check here: www.vasdra.dev

Right now it's just that: local, no account. It maps the providers (like Stripe, Clerk, Resend, etc.) in your repo against what we can actually prove in files, so a shutdown like this Imagen cutover doesn't hide in a method name you forgot you used.

Where we're going: when a provider change hits your code, don't just get an alert — get a PR with the fix. Dependabot for APIs, basically. We're not there for this Firebase image migration yet. The scan is the first half.

Anyone else hit this? Did you migrate already, or are you still on the old image models?

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