Claude Sonnet 5.5 quotas stuck at 0 despite active billing – Manual access review requested

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Hello Google Cloud Team,

We are heyamy GmbH, a German company preparing our AI application “heyamy sense” for production.

Project ID: (PII Removed by Staff)
Model: Claude Sonnet 5.5
Required location: EU multi-region (eu)

We are unable to use Claude Sonnet 5.5 through Google Cloud Vertex AI, although our project appears to be correctly configured.

What we have already verified:

  • Our Google Cloud billing account is active and upgraded to a paid account.

  • Valid payment methods are configured.

  • Successful Gemini requests have generated billable Vertex AI usage.

  • The Agent Platform API is enabled.

  • Claude Sonnet 5.5 is marked as ready to use in Model Garden.

  • All relevant Claude Sonnet quotas remain at 0, both in EU multi-region and Global.

  • The quota adjustment interface only allows values between 0 and 0.

  • API requests fail with HTTP 429 RESOURCE_EXHAUSTED.

  • A direct test in Agent Studio also fails because the Claude Sonnet 5.5 quota is exhausted.

We contacted Google Cloud Sales on November 7, 2026, but have not received a confirmation or response. Our Basic Support plan does not provide access to technical support cases.

Our questions:

  1. Why are all Claude Sonnet quotas set to 0 despite active paid billing and model availability?

  2. Is an additional account verification, partner-model approval or initial quota activation required?

  3. How can we request an initial non-zero quota for Claude Sonnet 5.5 in the EU multi-region without purchasing a technical support plan?

  4. Could a Google Cloud team member review our project’s eligibility or forward this issue to the responsible team?

We only require a small initial quota for testing. EU-based processing is important for our application.

Thank you for your assistance.

heyamy GmbH

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