Voice Agent Pricing Calculator
Compare voice agents API costs and simulate latency
What it does
The Voice Agent Pricing Calculator helps developers compare STT, LLM, and TTS providers to build optimal voice AI agents. Calculate realistic per-minute costs and visualize end-to-end latency across the entire voice-to-voice pipeline.
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- IBI 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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