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Working paper / 2026

MIVAS

Multi-Industry Voice Agent Simulation Bench

Abstract

Multi-Industry Voice Agent Simulation Bench (MIVAS) is an indicator of voice AI performance across economic sectors. MIVAS is comprised of tasks and verifiers with granular rewards executed in production-grade multi-agent RL environments across industries where voice AI is being adopted the fastest. Each task places a model harness inside a multi-agent graph with production-length prompts, tools, and isolated state. Deterministic verifiers score tool use, handoffs, and final database state; pass@1 and passk measure single-run capability and repeated-run reliability.

GitHub repository ↗

Clone the repository, pair a model harness with an industry task suite, and reproduce the evaluation environment.

Healthcare / C1-M1

C1-M1: New-patient rash visit at Park Avenue

mediumNew patient access· Hal Brenner

What this task measures

The caller is on the line with Straus Dermatology for one locked request: New-patient rash visit at Park Avenue. They keep repeating that ask through a waitlist offer, a callback, or a different errand. We included it as a medium new patient access case because first-contact dermatology work is scored on holding a narrow office question through booking offers, waitlists, and extra yeses. The agent succeeds only if it stays on that request, reaches the outcome by taking the scheduling path, and leaves the record exactly as this case requires: the right row written or cleared, and nothing extra.

Performance

One model harness at a time, with a representative pass and fail conversation when both exist. OpenAI Realtime 2.1 is the default view.

Recording

Conversation cost $0.733

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Audio

Speech Audio

Agent Audio

Handoffs

Tool Calls

Errors

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Transcript

How a conversation passes

Combined pass is the logical and of three deterministic gates. Tools, handoff path, and final database state must all pass on the same conversation. One miss fails the call.

This sample fails because tools and final database state did not match. Combined cannot pass unless every gate does.

1. Tools

Expected versus actual tool calls on this conversation.

Expected

Actual

  • transfer_to_schedulingtransfer_to_schedulingto=scheduling · from=receptionhit

    Parameters

     
    + from: reception
     
    + to: scheduling

    Output

    None recorded.

    None recorded.

  • classify_visit_requestvisit_class=medical · urgency=routine · is_new_patient=trueclassify_visit_requesturgency=routine · visit_class=medical · is_new_patient=truehit

    Parameters

      is_new_patient: true
      is_new_patient: true
      urgency: routine
      urgency: routine
      visit_class: medical
      visit_class: medical

    Output

     
    + ok: true
  • find_slotslocation_ids=["loc_park_ave"]missing

    Parameters

    - location_ids: ["loc_park_ave"]
     

    Output

    None recorded.

    None recorded.

  • book_appointmentlocation_id=loc_park_ave · slot_id=slot_loc_park_ave_1 · provider_id=prov_chenmissing

    Parameters

    - appointment_type_code: NP_MED
     
    - end: 2026-08-24T09:30
     
    - location_id: loc_park_ave
     
    - provider_id: prov_chen
     
    - slot_id: slot_loc_park_ave_1
     
    - start: 2026-08-24T09:00
     

    Output

    - data: {"status":"booked"}
     
    - ok: true
     
  • send_smsmobile_e164=+12125550194 · template_id=appointment_confirmationmissing

    Parameters

    - mobile_e164: +12125550194
     
    - template_id: appointment_confirmation
     

    Output

    - data: {"sent":true}
     
    - ok: true
     
  • list_locationslocation_id=loc_park_aveextra

    Parameters

     
    + location_id: loc_park_ave

    Output

     
    + ok: true
  • end_callreason=caller_doneextra

    Parameters

     
    + reason: caller_done

    Output

    None recorded.

    None recorded.

Open a row for parameters and outputs. Required tools must appear. Extra industry tools are allowed. Missing: find_slots, book_appointment, send_sms. Extra: list_locations, end_call.

2. Handoff path

Full industry architecture, same graph as the industry page. The left diagram marks the expected specialist path in green. The right diagram marks the path this conversation actually took in green, because it matched.

Expected path

transfer_to_scheduling

Actual path

transfer_to_scheduling

3. Final database state

Rows that differ between the expected hangup and the actual hangup.

missing · appointments · 4

Expected

Actual

- appointment_type_code: NP_MED
 
- description: new patient visit
 
- end: 2026-08-24T09:30
 
- id: 4
 
- location_id: loc_park_ave
 
- patient_id: empty
 
- provider_id: prov_chen
 
- start: 2026-08-24T09:00
 
- status: booked
 

Scores across model harnesses

Model harnesspass@1pass5Runs

Task definition

Locked caller script. This is the technical definition. Copy it as written.

You are a new patient and you have an itchy rash on your forearm. You want a new-patient visit at Park Avenue — that office only. Answer their questions about who you are and how to reach you once, then proceed to booking. Take the first appointment time they offer. Do not ask for a different day, time, or office, and do not suggest any date of your own. Confirm that first time out loud. After they confirm a time is on the calendar, ask them to text you an appointment confirmation. That is the only text you want. Do not ask to add or change insurance. Do not ask for a callback, to speak to a person, a bill, a payment, the patient portal, a waitlist, financing, or the street, floor, or suite. A listed opening is not a booking. Do not thank them, say goodbye, or hang up until they confirm a time is on the calendar and that the appointment confirmation was texted. If they only list openings, say book the first one. If they confirm the booking but have not texted the confirmation, ask them to text you the appointment confirmation.

Caller traits

full_name
Hal Brenner
mobile
212-555-0194
date_of_birth
1975-12-02
carrier
Aetna
patient_status
new
zip
10016
preferred_office
Park Avenue