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AI receptionist accuracy statistics (2026): pass rates from real test calls

AI receptionist pass rates from Cozzo's test calls: 7 of 24 calls read a callback number back correctly. Per-test results, CSV (CC BY 4.0) and citation.

Reading a phone number back was the hardest test: 7 of 24 calls passed across 8 agents. Each agent got 3 calls per test, so one call moves a result a lot.

  • 7/24calls with the callback number read back correctly (Round 4)
  • 13/24read-backs correct for a fixed caller, roofing prompt (6 agents, Round 5)
  • 8 agents, 24 callsper test in Round 4 (3 calls each)
Pass rate by test, Round 4 (calls passed of calls scored)
  • S1: Callback number captured and read back correctly
    7/24 calls
  • S2: Reschedule
    24/24 calls
  • S3: Unknown insurance
    18/24 calls
  • S4: Interruption
    22/24 calls
  • S5: Dental emergency
    22/24 calls
  • Sat: Saturday hours answered after the cut-in
    24/24 calls
AgentS1S2S3S4S5Sat
ElevenLabs Agents1/33/33/33/33/33/3
Ultravox2/33/33/33/33/33/3
Millis AI0/33/33/33/33/33/3
Retell AI0/33/33/33/33/33/3
OpenAI Realtime API0/33/33/33/33/33/3
Vapi1/33/30/33/32/33/3
Bland AI1/33/33/31/32/33/3
LiveKit Agents (self-hosted)2/33/30/33/33/33/3

S1: Callback number captured and read back correctly. S2: Reschedule. S3: Unknown insurance. S4: Interruption. S5: Dental emergency. Sat: Saturday hours answered after the cut-in. Results are copied as published; some cells carry caveats (for example garbled caller audio) that are explained on the Round 4 page. Round 4 ran October 22, 2026; Round 5 ran October 23, 2026.

Use this data

Free to reuse under CC BY 4.0: credit Cozzo and link here.

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Cite this (APA)

Cozzo. (2026, October 22). AI receptionist pass rates by scenario [Data set]. https://cozzo.io/stats/ai-receptionist-accuracy

Cite this (link / HTML)

<a href="https://cozzo.io/stats/ai-receptionist-accuracy">AI receptionist pass rates by scenario</a> (Cozzo, 2026)

Embed this chart

<a href="https://cozzo.io/stats/ai-receptionist-accuracy"><img src="https://cozzo.io/stats/ai-receptionist-accuracy/chart.svg" alt="AI receptionist pass rates by scenario. Source: Cozzo" width="680" style="max-width:100%;height:auto"></a>
<p>Source: <a href="https://cozzo.io/stats/ai-receptionist-accuracy">Cozzo</a> (CC BY 4.0)</p>

Methodology and sources

FAQ

How accurate are AI receptionists?
It depends on the task. In Round 4, 7 of 24 calls read a callback number back correctly; other tests are shown by pass rate on this page.
How many calls is this based on?
Round 4: 8 agents, 3 calls each per test. Round 5 read-back: 4 calls per agent. These are small samples.
Can I reuse this data?
Yes, under CC BY 4.0. Credit Cozzo and link to this page.

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