Can we get an option to turn on thinking mode in Gemini 2.5 Flash. I was informed by Vapi support this week that Gemini 2.5 does not use thinking mode currently and there is no way to activate it in the Vapi agent configuration.

Lot of startups have Google Cloud credits and would prefer to use Gemini 2.5 Flash with thinking.

Without thinking mode, I have seen some critical lapses, which I do not get in Google AI studio with thinking mode on.