## Building low-latency voice agents in 3 lines of code with GPT Realtime 2

OpenAI recently announced [advanced voice intelligence in the API](https://openai.com/index/advancing-voice-intelligence-with-new-models-in-the-api/), including **GPT Realtime 2** for lower-latency, more natural spoken interactions. **AG2 Beta** wraps that class of model behind **`LiveAgent`**: one bidirectional session, continuous audio in and out, and provider-side voice activity detection so users can speak and interrupt like on a phone call—not like a walkie-talkie app.

In this post we walk through why that matters, how **`LiveAgent`** compares to the classic **STT → Agent → TTS** stack, and how to add **tools** and **subagent-style** delegation without giving up the realtime voice surface.