Until very recently, it was possible to use a single API key with both the Gemini API and Cloud Vision API. But now, a Gemini API key created in aistudio.google.com is restricted to Gemini API only, and you can’t enable other APIs for it:
And if you create a new key in console.clooud.google.com for Cloud Vision API, you can’t enable Gemini API:
Going forward, is there any way to use a single API key with both APIs? Is this change documented somewhere where I can read more about it?