No access to Gemini 3

Support
1

Hi, I have an agent running for weeks and for the first time ever today I got the error message below:

{“error”:{“message”:“{\n \“error\”: {\n \“code\”: 404,\n \“message\”: \“Publisher Model `projects/youai-prod/locations/global/publishers/google/models/Gemini 3-preview` was not found or your project does not have access to it. Please ensure you are using a valid model version. For more information, see: https://cloud.google.com/vertex-ai/generative-ai/docs/learn/model-versions\”,\n \“status\”: \“NOT_FOUND\”\n }\n}\n”,“code”:404,“status”:“Not Found”}}

2

Hi @alpersoy,

Apologies for the inconvenience!

Google deprecated Gemini 3, which triggered that error. We’ve implemented a fallback, so your agents are now automatically running on Gemini 3.1.