I'm using a logged-in account, not an API key. When using gemini-3.1-flash-image, I get 429 – QUOTA_EXHAUSTED / RESOURCE_EXHAUSTED. What causes this error and how can I fix it?

[GreateCorp]

I'm using a logged-in account, not an API key. When using gemini-3.1-flash-image, I get 429 – QUOTA_EXHAUSTED / RESOURCE_EXHAUSTED. What causes this error and how can I fix it?

[andrii-dolzhenko]

A logged-in account can still hit quota limits. Using OAuth instead of an API key does not mean the Antigravity models are unlimited.

429 RESOURCE_EXHAUSTED together with QUOTA_EXHAUSTED means the upstream account has exhausted the quota available for that model. gemini-3.1-flash-image has its own image-generation quota, so other Gemini models may still work while this one returns 429.

I would check the full error response for fields such as quotaResetDelay or quotaResetTimeStamp. If they are present, that tells you when the model should become available again.

The practical options are:

1. Wait until the quota reset time.
2. Use another connected Antigravity account that still has image quota.
3. Use another image model/provider temporarily.

Re-authenticating the same Google account or replacing an API key will not reset an upstream model quota.

If the reset time has already passed but 9Router still reports the model as unavailable, then I would check the 9Router version and post the complete 429 response, because at that point it may be a local cooldown/account-selection issue rather than the original quota exhaustion.