An interesting side bit about the gemini voice model is that you can use it in AI studio and type messages instead of using the microphone.

On the backend google does TTS to feed the model, which then speaks back you via sound on your speakers.

The “next step” is in the system prompt, not the model. Gemini leaked part of its system prompt to me a few days ago, and there was something in there encouraging it to ask the user what they wanted to do next at the end of its response. Something about “give the user 1 or 2 options for follow up”.

I honestly find it rather annoying, but Gemini has stopped doing it to me for the most part, so maybe they’re trying out a new system prompt.

I think the "next step" instruction is more about engagement than cost, basically giving the user some options to continue the chat. I always have had success by ending the prompt with "only reply with nothing else but the answer to the query in a precise way". This usually always works better than telling it to not ask leading questions etc but a straight up expectation of the answer format you need is an instruction that most models can follow imo