I'm paid, but 503 Error: The model is overloaded. Please try again later

I am currently using the Gemini 2.5 Pro API on a paid basis.
Since it is still pre-release, only a few test users are using it, but I frequently encounter

{“code”:503,“message”:“The model is overloaded. Please try again later.”,‘status’:"UNAVAILABLE”}

Reviewing Sentry logs shows this error occurred over 10 times within a single week.

My API request volume and token usage are not excessive, and I am not exceeding tier-specific limits.

I’ve noticed many others seem to be experiencing this issue. Has anyone found a solution?
We need to launch soon, but this is happening frequently and is serious.

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