New Realtime API voices and cache pricing

[ivan-luchkin-u]

I have shared my observations/thoughts on how to assess pricing for this API in this post

Estimate the cost for 1 min usage of Real-time API

There are multiple factors to this. The price per minute will always depend on the number of turns happened in the conversation. With number of turns increasing, the price will also increase because the conversation history gets bigger and the model keeps consuming it all with each new turn. Prompt caching should be included in the equation as well, because all or most tokens from previous turns will hit cache (both audio and text, both input and output) The context window of the model is 128k…