Can Vapi orchestrate tool calling, agent logic, and handoffs while the assistant’s primary conversational engine is a speech-to-speech (audio-in -> audio-out) model (like PersonaPlex), instead of a text-based LLM?

no

Hi, that's not currently possible.

any plans to support personaplex in short term?

Hi, We don't have any confirmed timeline for PersonaPlex support at the moment. We'll update as soon as we have more information.