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Plain-English guides to Vapi voice agents, per-minute pricing, latency tuning, and the broader voice AI ecosystem. No fluff, no affiliate spam.

Vapi basics

How Vapi voice agents work: the real-time pipeline explained

A Vapi voice agent is a real-time pipeline of STT → LLM → TTS glued to telephony. Here's exactly what happens on each turn, why every millisecond matters, and where the moving parts hide.

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Vapi pricing per minute: how the $0.05/min math actually works

Vapi's headline price is $0.05/min. Your real per-minute cost is that plus every provider on the pipeline. Here's the worked math for a typical call, plus where teams overspend.

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Compare platforms

Vapi vs Retell vs Bland: the honest 2026 comparison

Three developer-first voice agent platforms, three different bets. Here's how Vapi, Retell, and Bland actually differ once you ship, and how to pick the right one for your workload.

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Optimization

Reducing Vapi latency: the checklist that gets you under 800ms

First-word latency is what makes a Vapi agent feel alive. Here's the ordered checklist that reliably gets you under 800ms, plus the silent traps that add 500ms without you noticing.

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How voice AI works

Voice AI glossary: 30 terms every Vapi builder should know

A focused glossary of the language used on Vapi, Retell, Bland, and the broader voice AI ecosystem — with just enough context to know when each term actually matters.

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