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Gemini 3.1 Flash Live Preview vs GPT-Live 1 + GPT-6 Sol (low thinking)

GPT-Live 1 + GPT-6 Sol (low thinking) is ahead on reliability, success rate, agent responses, data accuracy, response time and cost, and Gemini 3.1 Flash Live Preview on stalled calls and interruption.

Last updated Methodology by Dileep Chagam

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Success rate by suite

Higher is better
Appointments59 scenariosMedicare23 scenarios
  • GPT-Live 1 + Sol lowOpenAI
    97%
    49%
  • Gemini 3.1 Flash LiveGoogle
    93%
    32%
Each model's share of calls that passed every check, on each suite.
Verdict

Which to pick

Pick Gemini 3.1 Flash Live Preview for fewer stalled calls (8.9 points lower) and handling interruptions (0.09 higher). Pick GPT-Live 1 + GPT-6 Sol (low thinking) for reliability across repeated calls (13.4 points higher), calls that pass every check (7.7 points higher), getting the agent's replies right (4.1 points higher), saving the caller's data correctly (9.8 points higher), fast replies (0.86s sooner) and lower cost ($0.015 cheaper).

Every metric, side by side

Reliability

Scenarios that passed on all three runs.

Gemini 3.1 Flash Live
62.2%6th
GPT-Live 1 + Sol low
75.6%2nd

GPT-Live 1 + Sol low, 13.4 points higher

Success rate

Calls that passed every check.

Gemini 3.1 Flash Live
76.0%5th
GPT-Live 1 + Sol low
83.7%3rd

GPT-Live 1 + Sol low, 7.7 points higher

Agent responses

Calls where the agent's replies reached the expected outcome.

Gemini 3.1 Flash Live
95.9%6th
GPT-Live 1 + Sol low
100.0%1st

GPT-Live 1 + Sol low, 4.1 points higher

Data accuracy

Calls where everything the agent saved matched exactly.

Gemini 3.1 Flash Live
79.2%5th
GPT-Live 1 + Sol low
89.0%2nd

GPT-Live 1 + Sol low, 9.8 points higher

Stalled calls

Calls where the agent went silent for 10 seconds or more.

Gemini 3.1 Flash Live
3.3%6th
GPT-Live 1 + Sol low
12.2%11th

Gemini 3.1 Flash Live, 8.9 points lower

Interruption

How well it handled being talked over, 0 to 5.

Gemini 3.1 Flash Live
4.985th
GPT-Live 1 + Sol low
4.8910th

Gemini 3.1 Flash Live, 0.09 higher

Response time

Median time to start replying after the caller finishes.

Gemini 3.1 Flash Live
2.88s11th
GPT-Live 1 + Sol low
2.02s6th

GPT-Live 1 + Sol low, 0.86s sooner

Cost / min

One minute of call at the vendor's published rates.

Gemini 3.1 Flash Live
$0.0703rd
GPT-Live 1 + Sol low
$0.0552nd

GPT-Live 1 + Sol low, $0.015 cheaper

The small figure is the place among ranked models. The cascade is not ranked.

GPT-Live 1 + Sol low answers first

GPT-Live 1 + Sol low 2.02s, Gemini 3.1 Flash Live 2.88s at the median.

Response time, median to p90

Lower is betterMedianTo p90
Medianp90
  • GPT-Live 1 + Sol lowOpenAI
    GPT-Live 1 + Sol low: median 2.02s, p90 2.42s
    2.02s2.42s
  • Gemini 3.1 Flash LiveGoogle
    Gemini 3.1 Flash Live: median 2.88s, p90 4.00s
    2.88s4.00s
2.0s3.0s4.0s
Seconds from the caller finishing to the agent starting to reply, per model.

What we saw on the calls

Gemini 3.1 Flash Live Preview

  • Reliable on bookings.
All 3 notes on Gemini 3.1 Flash Live
Model
models/gemini-3.1-flash-live-preview
Setting
Thinking level high
Voice
Charon
Turn taking
Shared local turn detection
Audio
16 kHz
Cost
Averaged over the calls with a usage record.

GPT-Live 1 + GPT-6 Sol (low thinking)

  • Near perfect on bookings, run after run.
All 4 notes on GPT-Live 1 + Sol low
Model
gpt-live-1
Setting
Delegates reasoning and tools to Sol
Voice
marin
Turn taking
Service turn detection
Audio
24 kHz
Cost
Includes the delegated backend model.
See the full leaderboardReference agent

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Frequently asked questions

Is Gemini 3.1 Flash Live Preview or GPT-Live 1 + GPT-6 Sol (low thinking) more reliable?

GPT-Live 1 + GPT-6 Sol (low thinking) is more reliable, by 13.4 points. Gemini 3.1 Flash Live Preview passed 51 of 82 scenarios on all three runs, and GPT-Live 1 + GPT-6 Sol (low thinking) passed 62. A scenario only counts when every run of it passed.

Which should I pick, Gemini 3.1 Flash Live Preview or GPT-Live 1 + GPT-6 Sol (low thinking)?

For a phone agent, GPT-Live 1 + GPT-6 Sol (low thinking), since it gets more scenarios right on every run. GPT-Live 1 + GPT-6 Sol (low thinking) is ahead on reliability, success rate, agent responses, data accuracy, response time and cost, and Gemini 3.1 Flash Live Preview on stalled calls and interruption.

Which saves caller data more accurately, Gemini 3.1 Flash Live Preview or GPT-Live 1 + GPT-6 Sol (low thinking)?

GPT-Live 1 + GPT-6 Sol (low thinking), by 9.8 points. Gemini 3.1 Flash Live Preview saved everything exactly right on 79.2% of the calls that save data, and GPT-Live 1 + GPT-6 Sol (low thinking) on 89.0%. On Appointments, 96.5% against 100.0%. On Medicare, 34.8% against 60.6%. A call counts only when nothing is missing, wrong, extra or saved twice.

Is Gemini 3.1 Flash Live Preview faster than GPT-Live 1 + GPT-6 Sol (low thinking)?

No. GPT-Live 1 + GPT-6 Sol (low thinking) starts replying 0.86s sooner at the median. Gemini 3.1 Flash Live Preview takes 2.88s at the median and 4.00s at p90; GPT-Live 1 + GPT-6 Sol (low thinking) takes 2.02s and 2.42s. Both are measured on the call audio, from the caller finishing to the agent starting to reply.

Which handles interruptions better, Gemini 3.1 Flash Live Preview or GPT-Live 1 + GPT-6 Sol (low thinking)?

Gemini 3.1 Flash Live Preview, by 0.09 on a 0 to 5 scale. Gemini 3.1 Flash Live Preview scores 4.98 and GPT-Live 1 + GPT-6 Sol (low thinking) 4.89 for how well the agent handled being talked over.

Which goes silent on callers less often, Gemini 3.1 Flash Live Preview or GPT-Live 1 + GPT-6 Sol (low thinking)?

Gemini 3.1 Flash Live Preview, by 8.9 points. The agent went silent for 10 seconds or more on 3.3% of Gemini 3.1 Flash Live Preview calls and 12.2% of GPT-Live 1 + GPT-6 Sol (low thinking) calls.

Which is cheaper, Gemini 3.1 Flash Live Preview or GPT-Live 1 + GPT-6 Sol (low thinking)?

GPT-Live 1 + GPT-6 Sol (low thinking) is $0.015 cheaper a minute. Gemini 3.1 Flash Live Preview costs $0.070 a minute of call and GPT-Live 1 + GPT-6 Sol (low thinking) $0.055, at each vendor's published rates.

Where does the Gemini 3.1 Flash Live Preview vs GPT-Live 1 + GPT-6 Sol (low thinking) data come from?

Cekura ran both as the whole agent in the same open-source Pipecat pipeline, with the same prompt, tools and connection. A simulated caller worked through all 82 scenarios on live calls, three times each, 2,952 calls across the benchmark. A call passes only when the agent said the right things and saved the right data.