Manual billing sync request — 429 "prepayment credits are depleted" despite funded Cloud Billing account

Project ID: project-f3565e22-5d5a-4e60-a..
API key (last 4 chars): …Snnw
Billing tier shown: Tier 1 · Pós-pagamento
Cloud Billing status: R$1.745 in credits, 0 used, expires 2026-11-03

Getting 429 RESOURCE_EXHAUSTED on generateContent calls to
gemini-2.5-flash-image with message:

“Your prepayment credits are depleted. Please go to AI Studio at
https://ai.studio/projects to manage your project and billing.”

Cloud Billing console shows full credit balance available and unused.
AI Studio project billing appears out of sync with Cloud Billing.
Requesting manual billing sync for this project.

Hello @Mercati_Joias ,

Have you signed up for a free trial account when creating the new account via Google Cloud ?