OpenAI Realtime API
GPT-Realtime-2 Voice Demo
OpenAI's new GPT-Realtime-2 brings GPT-5-class reasoning into live voice. This demo uses a server-side Natural 20 endpoint to create the Realtime session, then streams browser microphone audio over WebRTC.
Live voice demo
Talk to GPT-Realtime-2
This mints a short-lived GA Realtime client secret through a Natural 20 server route, then opens a direct WebRTC voice session with OpenAI. The permanent API key stays server-side.
Status
Ready to start a live GPT-Realtime-2 session.
Session events
No events yet.
Model
gpt-realtime-2
Transport
WebRTC
Reasoning
low effort by default
Why this matters
Voice AI stops feeling like a chatbot when it can listen, reason, speak back, and keep moving through a task in real time. GPT-Realtime-2 is built for that pattern: lower-latency conversation, tool-ready sessions, stronger recovery behavior, and adjustable reasoning effort for more complex requests.