Hi team,
I’m using Gemini API from Google AI Studio and have already enabled billing (Tier 1).
However, image generation/editing requests are still rejected as Free Tier with limit 0.
Environment:
- Region: Japan
- API source: Google AI Studio API key
- Model: gemini-3.1-flash-image-preview (error mentions gemini-3.1-flash-image)
- Endpoint: models/*:generateContent
- Billing: Enabled (Tier 1 shown in AI Studio)
- I already regenerated API keys after enabling billing
- I also configured budget alerts/limits, but issue persists
Error (HTTP 429):
RESOURCE_EXHAUSTED
- Quota exceeded for metric: generativelanguage.googleapis.com/generate_content_free_tier_input_token_count, limit: 0, model: gemini-3.1-flash-image
- Quota exceeded for metric: generativelanguage.googleapis.com/generate_content_free_tier_requests, limit: 0, model: gemini-3.1-flash-image
- Quota exceeded for metric: generativelanguage.googleapis.com/generate_content_free_tier_requests, limit: 0, model: gemini-3.1-flash-image
What I already tried:
- Enabled billing and confirmed Tier 1 in AI Studio
- Regenerated API key in the billed project
- Waited for propagation and retried multiple times
- Verified project is linked to billing account
Could you please check if this project/key is stuck on Free Tier quota classification on backend?
I can share Project ID and request timestamps privately with moderators if needed.
Thank you.