---
title: End-User Perceived Latency Metrics for Voice AI Assistants | Telnyx
canonical: https://telnyx.com/release-notes/end-user-perceived-latency-ai-assistant-demos
---
# End-User Perceived Latency Metrics for Voice AI Assistants | Telnyx

[Release notes](https://telnyx.com/release-notes)

# End-user perceived latency metrics in shareable AI assistant demo links

### 17, Dec 2025

Shareable demo links for AI assistant widgets now display end-user perceived latency for each conversational turn. This exposes the full round-trip delay a user experiences, instead of platform-side timing that excludes last-mile effects.

## What’s new

* **Per-turn latency display:** Shows latency after every user-agent exchange in shareable demo links.
* **Client-side measurement:** Latency is captured on the end user’s device, not Telnyx backend infrastructure.
* **Full round-trip timing:** Measures from when the user stops speaking to when agent audio begins.
* **End-to-end scope:** Includes turn detection, STT, LLM, TTS, tool calls, orchestration, and network transmission.
* **Voice-relevant metric:** Reflects the mouth-to-ear turn gap used to evaluate voice agent responsiveness.

## Why it matters

* **Reflects real user experience:** Includes last-mile network latency that platform metrics and recordings miss.
* **Prevents misleading comparisons:** Backend or recording-based metrics systematically underreport perceived delay.
* **Improves agent tuning:** Helps isolate whether latency comes from models, tools, or network conditions.
* **Aligns with voice standards:** Uses the most meaningful latency metric for conversational voice agents.

## Example use cases

* Sharing accurate latency data during customer demos.
* Comparing perceived responsiveness across regions or devices.
* Explaining why live calls feel slower than platform recordings.

## Getting started

1. Log in to the [Mission Control Portal](https://portal.telnyx.com)
2. Navigate to your AI assistant widget.
3. Open or generate a publicly shareable demo link.
4. Run a voice conversation and review per-turn latency shown in the demo UI.

**Learn more** by exploring AI assistant widgets in the [Mission Control Portal](https://portal.telnyx.com)or by contacting your Telnyx team.

[Start building](https://telnyx.com/sign-up)

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