Hi,
With Google, I don’t implement specific model; as soon as they are available in your Google account, they can be retrieved by AI Engine via the Refresh Models button.
Personally, I do not have access to Gemini 1.5 yet, but I didn’t do anything to get it – it is still very new and, to be honest, the process is a bit unclear. It seems there is a process, and it’s also not available from any country. Some people also say it is simply not available through the API yet (as of March 15, at least).
Have a look at this: https://www.googlecloudcommunity.com/gc/AI-ML/Gemini-1-5-Pro/m-p/724480.
You’re right, it seems gemini 1.5 is only available for testing in the studio and has not yet been deployed via API. You are amazing and always enthusiastic, thank you!