bench.audio

What it does

An open-source LMSYS like ELO benchmark for voice agents talk to two different voice agents and vote which was better gpt-4o coming soon! will put out ELOs in two week!

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  I built a sub-500ms latency voice agent from scratchMar 2026 · ntik.me · ▲570

  I built a voice agent from scratch that averages ~400ms end-to-end latency (phone stop → first syllable). That’s with full STT → LLM → TTS in the loop, clean barge-ins, and no precomputed responses. What moved the needle: Voice is a turn-taking problem, not a transcription problem. VAD alone fails; you need semantic end-of-turn detection. The system reduces to one loop: speaking vs listening. The two transitions - cancel instantly on barge-in, respond instantly on end-of-turn - define the experience. STT → LLM → TTS must stream. Sequential pipelines are dead on arrival for natural…

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