Good question! Yes and to do this you'd want to use our "Self-Managed Pipeline": https://lemonslice.com/docs/self-managed/overview. You can combine any TTS, LLM and STT combination with LemonSlice as the avatar layer.

I'm using an openAI realtime voice with livekit, and they said they have a livekit integration so it would probably be doable that way. I haven't used video in livekit though and I don't know how the plugins are setup for it

Good question. When using the API, you can bring any voice agent (or LLM). Our API takes in what the agent will say, and then streams back the video of the agent saying it.

For the fully hosted version, we are currently partnered with ElevenLabs.