Voice

OpenAI Realtime API

WebSocket-based voice interface enabling ultra-low-latency, bidirectional LLM conversations.

Overview

OpenAI's Realtime API packages Whisper, TTS, and GPT reasoning into a single streaming WebSocket connection, allowing full-duplex voice interactions with tool use, session configuration, and event-driven control. It's designed for conversational UIs and voice agents.

Best for

full-duplex voice agents
LLM-powered conversational demos
real-time tool-use assistants

Trade-offs

vs Retell AI

OpenAI Realtime offers seamless GPT integration and unified voice/text reasoning; Retell AI provides more provider flexibility and specialized VAD/interruption tuning.

What XeroHack pre-wires

When you pick OpenAI Realtime API in the interview, the engine emits these files into your scaffold:

websocket event handler
session config payload
tool call dispatcher

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