Allowlist request: gemini-3.1-flash-image-preview & gemini-3-pro-image-preview (production project, GA verified)

Hi Google AI / Vertex AI team,

I’m requesting allowlist access for the following Vertex AI preview
image-generation models on a production GCP project:

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

== Project details ==

  • GCP Project ID: liquid-sylph-494915-k9
  • Endpoint: global
  • Billing: enabled (active)
  • Vertex AI API: enabled
  • Service account role: Vertex AI User (already provisioned)

== Verification status ==
We’ve completed end-to-end integration with the GA model
gemini-2.5-flash-image on the same project, including:

  • image generation (live traffic from a Photoshop UXP plugin)
  • per-request billing + credit ledger
  • audit logs (every request stored in usage_logs with model / size / cost)
  • graceful fallback: a “model not allowlisted” error from a 3.x request
    is auto-degraded to 2.5-flash-image, with delta-credits refunded — so
    we can ship the upgrade gradually without breaking users

== Use case ==
A commercial Photoshop UXP plugin (“GeminiPlugin AI 2026”) that lets
graphic designers generate / iterate poster layouts, packaging mockups,
and creative compositions directly inside Photoshop. The 3.x preview
family would give us:

  • 3 Pro Image: higher fidelity for final-deliverable poster work
  • 3.1 Flash Image: faster latency + lower cost for the
    iterate-many-times stage

== Note ==
I previously posted a similar request on Google Cloud Community
5 days ago (0 replies so far). Cross-posting here in case the AI Studio /
Vertex AI team handles preview-model allowlisting through this forum
instead. Happy to provide any additional info — security review,
content-policy compliance, expected QPS, billing tier, etc.

Thanks!