Request allowlist access for Gemini 3 preview models / Nano Banana Pro in Vertex A

Gemini API
1

Hello,

I am requesting allowlist access for the Gemini 3 preview image generation models (Nano Banana series) in Vertex AI so I can use my Google Cloud Free Trial $300 credits.

Requested models:

  • gemini-3-pro-image-preview → Nano Banana Pro

  • gemini-3.1-flash-image-preview → Nano Banana 2

My situation:

  • I have an active Google Cloud Free Trial with $300 credits.

  • Regular Gemini API keys (AI Studio) do not use my $300 credits.

  • In Vertex AI I get either “Access denied by organization” or the preview models simply do not appear in the list (only Gemini 2.5 is available).

  • I already created a service account with Vertex AI Administrator / User roles.

  • I want to generate images using these preview models and have the cost deducted from my Free Trial balance.

Preferred location: global (or us-central1)
Could you please whitelist my project for these Gemini 3 preview image models?

Thank you in advance!

2

Hello @ Wshh_Tinkiete,
This forum is primarily intended for the Gemini API and Google AI Studio. For issues related to the Vertex AI API;

  • Contact your sales representative if you have one.
  • Otherwise, you may find more relevant assistance on the Google Cloud Forum.