How OpenAI Built GPT-Live
To understand how it all works end to end, we met with engineers on the GPT Voice team, Zahan Malkani and Justin Uberti (who created WebRTC).
4 stories
To understand how it all works end to end, we met with engineers on the GPT Voice team, Zahan Malkani and Justin Uberti (who created WebRTC).
Listen and speak at once with Full Duplex in Famulor. Compare Pipeline, Half Cascade and Realtime, with model benchmarks, TTS data and use cases.
GPT-Live at OpenAI: full duplex, live translation, agentic search. At Famulor separately: Full Duplex (Beta), Translate, Perplexity — plus the EU region note.
On July 8, 2026, OpenAI replaced Advanced Voice Mode with GPT-Live, a full-duplex voice that listens and speaks at the same time. Here is what changed, how full-duplex differs from the old turn-based voice, and why it means voice is becoming the operating system for real work.
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