Veo 3.1 RESOURCE_EXHAUSTED despite low usage

We are using Veo 3.1 (veo-3-generate / veo-3-fast-generate) for video generation in our project and are experiencing frequent RESOURCE_EXHAUSTED errors (~70% of requests), even at low request volume.

We have verified that:

  • Veo models are available in our project
  • Visible quotas (including per-model daily limits) are not being approached
  • No quota limits appear to be exceeded

We also confirmed through the quota dashboard that there are no obvious RPM or concurrency limits exposed for Veo.

Based on similar discussions, this appears to be related to backend capacity limits or hidden concurrency throttling rather than standard quotas.

Project ID: (PII Removed by Staff)
Region: us-central1

Is there a way to:

  • Request increased concurrency or capacity for Veo?
  • Get allowlisted for higher usage tiers?
  • Or understand the effective limits for Veo 3.1?

This is currently blocking reliable usage in testing workflows.

Any guidance would be greatly appreciated.