Allowlist request: gemini-3-pro-image-preview and gemini-3.1-flash-image-preview on Vertex AI / Agent Platform

Gemini API
1

Hi Google AI Team,

Requesting allowlist access for the following Vertex AI / Agent Platform
preview image models for our production project:

  • gemini-3-pro-image-preview
  • gemini-3.1-flash-image-preview

Project details:
GCP Project ID: manifest-ivy-495921-h6
Region: us-central1
Endpoint: regional
Billing: Enabled (active)
Vertex AI API / Agent Platform API: Enabled
Service account role: Agent Platform User (aiplatform.user)

Use case: AI image generation for restaurant chain interior wall mockups.
We’re building an internal tool that our design team uses to visualize
distressed-orange branded walls at new franchise locations before construction.
The tool composes posters, signage, graffiti, and other graphic elements
onto a wall plan, then uses Gemini’s image models to render the
final wall mockup at high resolution (2K and 4K) for review and approval.

Currently working with gemini-2.5-flash-image (1K). We need
gemini-3-pro-image-preview specifically for the higher resolution and
better text rendering on poster typography (Bollywood-era movie titles,
hand-painted Bengali signage), and gemini-3.1-flash-image-preview for
the faster iteration cycles during early design exploration.

Currently getting 404 NOT_FOUND when calling these models from our
configured project. Confirmed access works for gemini-2.5-flash-image.

Thank you.

2

Hi Google AI Team,

Following up on the allowlist request from 4 days ago. I can see there has been some activity on the thread but no reply with status yet. Wanted to check in.

From our end the status is unchanged: project manifest-ivy-495921-h6, us-central1, billing active, Vertex AI API enabled, service account role correct. Calls to gemini-3-pro-image-preview and gemini-3.1-flash-image-preview still return 404 NOT_FOUND. The 2.5-flash-image endpoint continues to work.

For context, this is a Google Workspace customer (47 seats, Gemini deployed across the organization). The project is for an active production tool currently in use by the design team. If there is a more direct channel (Vertex AI support ticket, Workspace support, or a Cloud account contact) that’s the right route for allowlist follow-ups on a paying Workspace project, please point me there.

Thanks for the help.

3

For context, this is a Google Workspace customer (43 seats, $789/month, Gemini deployed across the organization).

4

Hello, 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