AI / Voice
Latency
Latency is the elapsed time between a caller's speech and the agent's response, including listening, processing, tool, network, and speech-generation delays.
Latency is the elapsed time between a caller's speech and the agent's response, including listening, processing, tool, network, and speech-generation delays.
Latency is the delay a caller experiences between speaking and hearing the agent respond. In voice AI, this is not one measurement from one component. It can include the time required to detect that the caller has finished, transcribe the audio, interpret the request, run a lookup or action, generate a reply, synthesize speech, and send audio across the network.
Why latency matters
Conversation has a rhythm. Long pauses can make callers repeat themselves or assume the line has failed. Responses that start too quickly can interrupt the caller. The correct goal is responsive turn-taking, not simply the lowest possible number. Thoughtly's testing guidance recommends evaluating endpointing, interruption behavior, utterance-end timing, and silence settings on real calls.
What affects voice-agent latency
- Network distance and call-carrier conditions.
- Endpointing settings that decide when a person has finished speaking.
- Speech recognition, language-model, and text-to-speech processing.
- External actions such as CRM, calendar, or eligibility lookups.
Teams should measure more than an average. Slow outliers, tool failures, clipped speech, and interruptions can damage the experience even when the typical response is fast. Test with different accents, speaking speeds, background conditions, and call routes.
Frequently asked questions
Is latency the same as speed to lead?
No. Latency is the delay within a live interaction. Speed to leadSpeed to leadSpeed to lead is the elapsed time between an inbound inquiry and the first meaningful response from the business. is the time between an inquiry and the first response or call attempt.
Can latency be removed completely?
No. Every processing and network step takes time. The practical work is reducing unnecessary delay while preserving accurate listening and reliable actions.