[Bug/Support] Automatically downgraded from Tier 3 to Tier 1 — causing production outages

Hello,

I’m experiencing an issue where my Gemini API access was automatically downgraded from Tier 3 to Tier 1 without any action on my part. This is now causing production-level outages.

What happened:

  • My project was on Tier 3 for some months
  • I was downgraded automatically to Tier 1 with no notification
  • Billing is active on the project — this was not a billing lapse
  • I did not change any settings or violate any usage policies

Impact:

  • Receiving 429 rate limit errors in production
  • Partial service outages for end users
  • Blocking the development of new AI products which require agentic behaviour
  • Tier 1 limits are far below what our production workload requires, which was stable and within Tier 3 limits

What I’ve already tried:

  • Checked the Quotas page on Google Cloud Console — usage data is not being tracked correctly; real usage and rate limit errors do not appear there
  • Attempted to fill the Gemini API Tier Increse forms: I’ve filled that 15 days ago and still didin’t receive any response

What I’m requesting:

  • Immediate restoration of Tier 3 access given active billing and stable prior usage
  • Clarification on why the automatic downgrade occurred

This is a production system and the downgrade is causing active outages. Any help or escalation would be greatly appreciated.