# Part 1 — Engineering behind OpenAI’s GPT-Live > Source: > Published: 2026-07-09 14:01:03+00:00 Member-only story # Part 1 — Engineering Behind OpenAI’s GPT-Live ## All You Need to Know About OpenAI GPT Live The hardest part of voice AI isn’t generating speech. It’s responding fast enough, and today lets see what is happening behind the scenes. Recently, OpenAI introduced **GPT-Live**, the new model family powering ChatGPT Voice for more than 150 million weekly users. While most announcements focused on **more natural conversations**, the real story isn’t the voice itself it’s the engineering that makes those conversations feel effortless. GPT-Live represents a significant rethink of how real-time AI should work. Instead of simply making a language model speak, OpenAI redesigned the entire inference pipeline around low latency, continuous interaction, and speech-native reasoning. I feel we are moving from Cascaded to Real time models, recently also with [Kyutai]… Come back, in this post, we’ll look past the product announcement and unpack the engineering decisions behind GPT-Live what changed, why it matters, and what it tells us about the future of production voice AI.