Justin Uberti (@juberti) / X

Justin Uberti

5,563 posts

Justin Uberti

@juberti

Head of Realtime AI @OpenAI. Created WebRTC. Past: Distinguished Engineer @google, AIM. Amateur mathematician/musician.

Seattle, WA

Joined February 2007

Pinned
Justin Uberti
@juberti
Aug 3
Just posted our technical deep dive on the GPT-Live system, by @zahanm and yours truly.
OpenAI
@OpenAI
Aug 3
GPT-Live can listen while it speaks. To make that feel natural at ChatGPT scale, we rebuilt the voice stack from client to model. This new architecture keeps audio flowing continuously, so deeper reasoning and tool use don't interrupt the conversation.
Justin Uberti
@juberti
21h
One other WebRTC thing we did for GPT-Live: we worked with @_pion to build a production-quality Opus decoder in Go, and are now using it in our systems. It supports the full Opus bitstream, has performance close to the C version, and is much more secure!
github.com
GitHub - pion/opus: Pure Go implementation of Opus
Pure Go implementation of Opus. Contribute to pion/opus development by creating an account on GitHub.
Justin Uberti
@juberti
21h
If you're interested in using WARP (faster startup for WebRTC) in your web app, most of the benefits are available today. Chrome supports DTLS 1.3, and you can enable SNAP (SCTP speedup) via an origin trial.
datatracker.ietf.org
WebRTC Abridged Roundtrip Protocol (WARP)
This document outlines a set of improvements to the WebRTC session setup protocols aimed at significantly reducing connection setup latency. This improved setup mechanism is known as the WebRTC...
Justin Uberti
@juberti
Aug 5
@pion has a spiffy new web page pion.ly
Justin Uberti
@juberti
Aug 5
Video from today's Built with WebRTC session with @tsahil. One of his first questions: which decisions that went into WebRTC needed to be revisited for the human-to-AI era? linkedin.com/events/7485922…
00:00