How we built a realtime system for responsive voice AI in six months

Source: OpenAI Date: 2026-08-03 URL: https://openai.com/index/continuous-voice-interaction-with-gpt-live

Summary

OpenAI’s GPT-Live, its third-generation voice system built in six months, uses a full-duplex architecture that processes user input and generates audio simultaneously, producing natural backchannel responses and turn-taking while delegating anything requiring search, complex reasoning, or agentic action to a separate background LLM.

Implications

• agent-orchestration: the delegation split — a fast conversational layer handling turn-taking, a slower reasoning layer handling actions asynchronously — is a concrete two-tier pattern applicable beyond voice, matching the router/worker splits seen in other agent frameworks.
• legibility/show-your-work: a real engineering writeup with architecture and benchmark detail rather than a bare capability announcement — a positive example for this thread, worth contrasting against launch posts that assert results without showing the build.