### Answer
I don't have information in the available sources that explains why leaving voicemail messages costs extra tokens or details the specific pricing/token structure for voicemail functionality.
The documentation covers how to configure voicemail detection and the options available (hang up or leave a message) , but doesn't address token costs or pricing specifics. [(1) ](
)
Check out these potentially useful sources:
- [Handle voicemail](
)
- [Get Voice Agent](
)
For pricing and billing questions, I'd recommend reaching out to Retell AI support directly. Would you like me to try to provide a general answer based on my knowledge instead?