I upgraded my Gemini API account to prepaid billing today and added ₹1000 credits. Immediately after the upgrade, all generateContent requests started failing.
- ListModels works successfully.
- API key is valid.
- Gemini API is enabled.
- Billing is active with prepaid balance.
- generateContent returns HTTP 503 “This model is currently experiencing high demand” for every request, including repeated retries.
- Older models return 404 due to deprecation, but all supported models fail with 503.
Please check whether my project or billing account is stuck in provisioning or rate-limited incorrectly.