[URGENT] 404 Not Found on ALL Gemini Text Models (Pro/Flash). Account-Level Restriction?

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Hello Google Cloud Community,

I am urgently seeking help for a critical issue. My account (PII Removed by Staff) appears to be blocked from accessing all standard Gemini text models (Pro and Flash) across two different paid projects.

This has blocked my development for several days, and all attempts to self-diagnose have failed.

Our Goal

We are trying to run a Python script to call gemini-pro or gemini-1.5-flash to process 14,000 text transcripts.

Confirmed Account Status

  • Billing: Active, paid billing is enabled (past invoices confirm this).

  • Permissions: My account (PII Removed by Staff) is “Owner” on both projects.

  • Authentication: Local auth is complete (gcloud auth application-default login was successful).

  • Paid Support: My account is blocked from creating a paid support ticket (“지원 기록을 만들 권한이 없습니다.”). This is why I am posting here.

Failure 1: Project (PII Removed by Staff) (Vertex AI)

This is our primary (paid) project.

  1. 404 Error: All Vertex AI API calls fail with 404 Publisher Model ... was not found. We tested:

    • gemini-1.0-pro

    • gemini-1.5-flash

    • gemini-2.5-pro

    • gemini-experimental

    • All failed across multiple regions (us-central1, us-east4).

  2. Missing Quotas: The “Quotas” page does not list any text models (Pro, Flash). It only shows quotas for gemini-audio-dialog models.

  3. Quota Request Blocked: When we try to manually request a quota increase for the missing gemini-pro model, the request is BLOCKED with the message: “Quota increase requests cannot be submitted for the specified options.” (지정한 옵션으로는…).

Failure 2: Project my youtube by GPT (AI Studio API)

We tried to bypass Vertex AI by using a key from our second project.

  1. 404 Error: This project’s API key (...ipM) also fails with 404 errors when calling text models.

  2. API Enabled: We confirmed the Vertex AI API was successfully enabled for this project today (the “Vertex AI Studio 시작하기” pop-up was completed).

  3. Test Results: After enabling the API, we tested again. The calls still fail:

    • model = genai.GenerativeModel("gemini-1.5-flash-latest") $\rightarrow$ 404 models/gemini-1.5-flash-latest is not found...

    • model = genai.GenerativeModel("gemini-pro") $\rightarrow$ 404 models/gemini-pro is not found...

Conclusion & Request

The evidence is conclusive: Both of my paid projects are fundamentally blocked from accessing standard Gemini text models. This is not a code, auth, or billing issue; it appears to be an account-level restriction.

Could a Google engineer please investigate my account (PII Removed by Staff) and projects ([PII Removed by Staff], my youtube by GPT) to see why we are blocked from all text model provisioning and lift this restriction?