CRITICAL BUG: Paid Project (Tier 1) Stuck on Free Tier Token Limit

[teoo]

API Quota Tier “Unavailable” despite active billing

I ran into the same issue. The fix is that instead of creating a new api from the Google AI Studio, first create a new project from the console & enable Gemini API, and then import the new project into the API Studio & create a new API. I believe the problem currently is that, AI studio is not able to sync back once the billing is mapped in the console.

This guy solved it