Gemini API Tier 1 Postpay project still returns “prepayment credits are depleted”

Gemini API
1

Hello,

I’m requesting a review of a Gemini API billing/quota issue.

Project 1:
Project ID: viktor-ai-bot
Project number: 881154563…

Project 2:
Project ID: viktor-ai-bot-free-test

Both projects are shown in Google AI Studio as:
Tier 1 · Postpay

Rate limits are visible and non-zero in AI Studio.

What works:

  • API keys are created successfully.
  • models.list() works.
  • Rate limit page shows Tier 1 and non-zero limits.

What fails:
generateContent returns:

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

This is confusing because the projects are shown as Tier 1 Postpay, not Prepay.

Could you please check whether the AI Studio billing state is stuck or incorrectly synced for these projects?

I’m using this for a personal low-volume Telegram assistant.

Thank you.

2

Hi Victor, can you fill in this form so we can check this out?

3

The same situation is happening on my account.

Even though it is set to deferred payment, this error occurred,

but after paying the minimum amount of the scheduled deferred payment, it works fine again.

4

I also had this issue