GPT Realtime 2.1 Mini

921

ELO

10th of 12

14.3%

Pass³

10th of 12

2.40s

Latency

9th of 12

$0.020

Cost/Min

1st of 8

ELO Rating vs. Latency P50

Higher wins more head-to-head calls (1000 = average); further left replies faster

Best quadrant
ELO Rating
Median latency (s)

GPT Realtime 2.1 Mini Against Every Other Model

Each model took the same recorded human callers on live calls. Pick a measure to see where GPT Realtime 2.1 Mini ranks.

Rating from head-to-head calls: on every call each pair of models is compared, the better call wins. 1000 is the average model. Higher is better.

#ModelELO Rating
  1. 01Grok Voice 3.01154
  2. 02GPT-Live 1 + GPT-6 Sol1069
  3. 03Gemini 3.1 Flash Live Preview1062
  4. 04GPT Realtime 2.11054
  5. 05Grok Voice Think Fast 2.01030
  6. 06Phonic-11030
  7. 07Azure Realtime1017
  8. 08Gemini 3.8 Live Extended Thinking1016
  9. 09Gemini 3.8 Live968
  10. 10GPT Realtime 2.1 Mini921
  11. 11Deepslate Opal847
  12. 12Amazon Nova 2 Sonic832
  • refCascade955

Where GPT Realtime 2.1 Mini Is Strong and Weak

Pick a skill family. The shape is this model on every skill in it; the dashed line is the median of the other models.

GPT Realtime 2.1 MiniMedian of the other models
54Hearing Score11th of 12−13 vs median
SkillScore · vs median
  • Degraded-Channel Robustness74%−1
  • Side-Speech Rejection95%−3
  • Prosodic Cue Understanding72%−6
  • Multi-Speaker Handling38%−6
  • Low-Confidence Confirmation11%−9
  • Emotion Recognition76%−11
  • Entity Extraction Accuracy10%−28
  • Waiting Through Hold55%−32

Share of calls where the skill was needed and handled, strongest first. Hover a point on the chart for both values.

Example Calls from GPT Realtime 2.1 Mini

Banking and healthcare callers. Each shows what the caller needed, what made the call hard, and how the model handled it.

First prenatal visit

Healthcare
Upset callerSeveral peopleTalks over the agentSlow system

Finished 3 of 6 steps

Handled well: Emotion Recognition, Overlapping-Speech Recovery, Tool-Latency Handling

Struggled with: Multi-Speaker Handling

Listen to the call

Urgent visit for a feverish child

Healthcare
Background voicesSlow systemAsks to holdNeeds consent

Finished 5 of 7 steps

Handled well: Side-Speech Rejection, Mid-Utterance Pause Tolerance, Redundant Re-prompt Avoidance

Struggled with: Tool-Latency Handling, Consent Verification

Listen to the call

Reschedule a specialist visit

Healthcare
Bad connectionSeveral peopleTalks over the agentChanges their mind

Finished 5 of 7 steps

Handled well: Multi-Speaker Handling, Overlapping-Speech Recovery, Correction Handling

Struggled with: Degraded-Channel Robustness

Listen to the call

Update insurance details

Healthcare
Bad connectionInterruptsNeeds consentCancels

Finished 5 of 7 steps

Handled well: Degraded-Channel Robustness, Backchannel vs Barge-in Detection, Consent Verification

Listen to the call

Loan payoff quote

Banking
Noisy lineHesitant callerAsks to holdNeeds consent

Finished 2 of 7 steps

Handled well: Prosodic Cue Understanding, Mid-Utterance Pause Tolerance, Redundant Re-prompt Avoidance

Struggled with: Low-Confidence Confirmation, Consent Verification, Cancellation Handling

Listen to the call

Change a mortgage payment date

Banking
Hold musicSeveral peopleNeeds a personNeeds consent

Finished 3 of 7 steps

Handled well: Waiting Through Hold, Multi-Speaker Handling, Redundant Re-prompt Avoidance

Struggled with: Human Handoff, Consent Verification

Listen to the call

Business loan documents

Banking
Slow systemAsks to hold

Finished 2 of 3 steps

Handled well: Tool-Latency Handling, Mid-Utterance Pause Tolerance, Redundant Re-prompt Avoidance

Struggled with: Premature-Response Avoidance

Listen to the call

Request a medical records transfer

Healthcare
Slow systemNeeds consentCancels

Finished 4 of 6 steps

Handled well: Cancellation Handling, Redundant Re-prompt Avoidance, Hallucinated-Success Avoidance

Struggled with: Tool-Latency Handling, Consent Verification

Listen to the call

Payment plan for missed loan payments

Banking
Hesitant callerSeveral peoplePauses mid-sentenceNeeds consent

Finished 3 of 6 steps

Handled well: Prosodic Cue Understanding, Consent Verification, Redundant Re-prompt Avoidance

Struggled with: Multi-Speaker Handling, Endpointing, Premature-Response Avoidance

Listen to the call

Remove a sold car from a policy

Banking
Noisy lineBackground voicesInterruptsChanges their mind

Finished 6 of 8 steps

Handled well: Side-Speech Rejection, Backchannel vs Barge-in Detection, Correction Handling

Struggled with: Low-Confidence Confirmation

Listen to the call

Latency at P50, P90 and P95

GPT Realtime 2.1 Mini starts replying in 2.40s on a typical turn and 3.00s on the slowest turn in twenty, 9th fastest of 12 at the median.

ModelP50P90P95
  • Cascade
    2.06s2.49s2.60s
Seconds from the caller finishing to the agent replying. The bar is the typical turn, P50.

How Much Audio GPT Realtime 2.1 Mini Was Tested On

210 live calls: 70 scenarios, each run three times. The median call ran 5:39.

Live calls
210
Scenarios
70
Banking calls
105
Healthcare calls
105
Replies per call
14.9
Median call
5:39

70 scenarios, the same for every model.

GPT Realtime 2.1 Mini FAQ

  • GPT Realtime 2.1 Mini has an ELO rating of 921, 10th of 12 ranked models. It passed 10 of 70 callers on all three runs, a Pass³ of 14.3%.

  • GPT Realtime 2.1 Mini starts replying 2.40s after the caller finishes at P50, 2.88s at P90 and 3.00s at P95: 9th fastest of 12 at P50, measured on the call audio.

  • GPT Realtime 2.1 Mini falls furthest behind on Entity-Heavy: 46%, against a median of 61%.

  • GPT Realtime 2.1 Mini has a task completion rate of 13.8%, 10th of 12. A call counts only when every step the caller needed was done.

  • $0.020 per minute of call at OpenAI's published rates, 1st cheapest of 8 priced models. Averaged over the calls with a usage record.

  • Cekura ran GPT Realtime 2.1 Mini as the whole agent with the same prompt, tools and phone connection as every other model. It took the same 70 recorded real human callers on live calls, three times each (210 calls), and each call was graded on 25 skills across Hearing, Turn Taking, Task Handling and Speaking.

Test your voice agent the same way.

Cekura runs these simulated calls on your agent and scores every one.