429 (Too Many Requests) errors for the model Gemini 2.0 Flash in paid tier 1 (postpay)

Gemini API
, , , ,
1

Hello everyone,

I’m seeking insights into recurring 429 (Too Many Requests) errors I’ve been encountering with Gemini models via Generative Language API v1beta, even though my Google Cloud Quota dashboard shows negligible usage (<0.1%). While the errors have become rare after my initial mitigations, they still appear occasionally, and I haven’t been able to clarify if this is an instantaneous quota limit or a specific rate-limiting behavior.

Technical Environment

  • Platform: Microsoft .net framework (Client)

  • API: Generative Language API v1beta

  • Models: Gemini 2.0 Flash

  • Tier : Paid Tier 1

  • Billing : PostPaid

  • Mode : Credit Card

2

I am also facing the same issue and that too on production.

I tried getting help from Google but they asked for paid support.

They also suggested to migrate everything from Gemini to Vertex AI.

Models i used : gemini-2.0-flash and switched to gemini-2.5-flash

I am a tier-1 user but my billing is 1 to 2 $ a month.

*My suggestion would be to switch models and try for temporary work around.