> This equates to approximately $0.06 per minute of audio input and $0.24 per minute of audio output.

https://openai.com/index/introducing-the-realtime-api/

About the nextjs site, I was thinking maybe its difficult to have supabase hold long connections, or route the response? I'm curious too.

The long connections are ultimately handled by Deno Edge so the site isn't used there. The NextJS frontend (which also could be an iOS/Android app) helps provide an interface to select character, create AI characters, set ESP32 volume, and view conversation history.

thank you! The nextjs frontend is to set things like device volume, selecting which character you are interacting with, viewing conversation history etc. I just tried it and for a 15 minute chat, it's roughly 20c. Roughly 570 input tokens

And I am wondering, why use an ESP32 if you don't need the WiFi? (And, please, no WiFi in a toy!)

Currently we connect to a Wifi network to reach the Deno edge server. Some popular toys doing it: Yoto, Toniebox