Glossary
What is Latency?
Latency, in AI calling, is the delay between when a caller finishes speaking and when the voice agent responds. Low latency is critical: long pauses make a call feel broken, while near-instant replies make it feel like a natural conversation.
By Alex Le, Echo product teamUpdated July 2026
Latency is the sum of speech recognition, language model reasoning, and speech synthesis time. Sub-second response is the target for a conversation that doesn't feel robotic.
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