Voice AI Glossary

Hallucination

When voice agents make up false information, invent policies, or provide incorrect facts during calls.

Expert-reviewed
1 min read
Updated September 24, 2025

Definition by Hamming AI, the voice agent QA platform. Based on analysis of 1M+ production voice agent calls across 50+ deployments.

Jump to Section

Overview

When voice agents make up false information, invent policies, or provide incorrect facts during calls. In modern voice AI deployments, Hallucination serves as a critical component that directly influences system performance and user satisfaction.

Use Case: Critical reliability issue - voice agents inventing return policies, quoting wrong prices, or making promises your business can't keep.

Why It Matters

Critical reliability issue - voice agents inventing return policies, quoting wrong prices, or making promises your business can't keep. Proper Hallucination implementation ensures reliable voice interactions and reduces friction in customer conversations.

How It Works

Hallucination works by processing voice data through multiple stages of the AI pipeline, from recognition through understanding to response generation. Platforms like Hamming, Vapi, Retell AI each implement Hallucination with different approaches and optimizations.

Common Issues & Challenges

Hamming AI's assertion testing specifically catches hallucinations where agents provide false information confidently. Their LLM-based evaluations verify factual accuracy and flag responses that deviate from ground truth.

Implementation Guide

Test for hallucinations using Hamming AI's approach: create test cases with known correct answers, validate agent responses against ground truth, monitor hallucination rates in production, and implement guardrails to prevent common hallucination patterns.

Hamming's Benchmarks

Based on Hamming's analysis of 1M+ production voice agent calls across 50+ deployments:

MetricExcellentGoodAcceptable
Hallucination Rate<5%<10%<15%

Frequently Asked Questions

When voice agents make up false information, invent policies, or provide incorrect facts during calls.

Critical reliability issue - voice agents inventing return policies, quoting wrong prices, or making promises your business can't keep.

Hallucination is supported by: Hamming, Vapi, Retell AI.

Hallucination plays a crucial role in voice agent reliability and user experience. Understanding and optimizing Hallucination can significantly improve your voice agent's performance metrics.