GoKawiilHello,
We are looking for guidance regarding an unexpected €54,000+ Gemini API charge that occurred within a few hours after enabling Firebase AI Logic on an existing Firebase project.
Background:
We created the project over a year ago and initially used it only for Firebase Authentication. Recently, we added a simple AI feature (generating a web snippet from a text prompt) and enabled Firebase AI Logic.
What happened:
Shortly after enabling this, we experienced a sudden and extreme spike in Gemini API usage. The traffic was not correlated with our actual users and appeared to be automated. The activity occurred within a short overnight window and stopped once we disabled the API and rotated credentials.
Additional observations:
We had a budget alert (€80) and a cost anomaly alert, both of which triggered with a delay of a few hours
By the time we reacted, costs were already around €28,000
The final amount settled at €54,000+ due to delayed cost reporting
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