Billed but not sure why

I just happened to notice that the project that I deployed my app to has racked up £11.90 of billable costs in the past month.

I’ve no idea why - I’m the only person who’s used the app, and that was just to try to get a connection to google photos working. What’s more worrying is there’s no way of seeing how that cost was generate - just a total cost per day - no itemisation of the api’s or prompts used to give me a clue.

I looked on google cloud console itself and there is slightly more info:
Gemini API at £11.89 driven by £11.89 from Project Yesterday Today and £11.89 from Region global and £4.77 from SKU **Generate_content image output token count for Gemini 2.5 Flash Native Image Generation
I think, after spending ages looking at the data it might be from a couple of times when I was trialling some photo to video as part of the app - in the app studio. The results were bad - it completely ignored my instructions to keep features the same, so my mum and dad from their wedding photo looked like strangers.

I don’t see how Google can justify charging me £5 a pop to create some unusable footage, and then not tell me it was going to charge me beforehand when I had promoted google AI studio as a free product. Total rip off.

If I was making actual videos, that would be one thing, but to charge for a useless result from a prototype is outrageous.**

Since Gemini 3.0 release, AI Studio is paid if you have created an API and connected a project to it. Same story with me. A single long context prompt to Gemini 3.0 costed me $2.50.

This was never the case with 2.5 Pro. Google starts to earn money, we need to accept it or switch to Chinese alternatives which are usually a fraction of the cost.

It’s quite frustrating that my AI Studio switched from 2.5 to 3 with no announcement at all, and then I get charged