Azure Realtime is ahead on reliability, success rate, agent responses, data accuracy and response time, and Gemini 3.1 Flash Live Preview on stalled calls, interruption and cost.
Last updated Methodology by Dileep Chagam
Pick Azure Realtime for reliability across repeated calls (8.5 points higher), calls that pass every check (8.1 points higher), getting the agent's replies right (2.8 points higher), saving the caller's data correctly (6.8 points higher) and fast replies (1.22s sooner). Pick Gemini 3.1 Flash Live Preview for fewer stalled calls (0.8 points lower), handling interruptions (0.01 higher) and lower cost ($0.009 cheaper).
Scenarios that passed on all three runs.
Azure Realtime, 8.5 points higher
Calls that passed every check.
Azure Realtime, 8.1 points higher
Calls where the agent's replies reached the expected outcome.
Azure Realtime, 2.8 points higher
Calls where everything the agent saved matched exactly.
Azure Realtime, 6.8 points higher
Calls where the agent went silent for 10 seconds or more.
Gemini 3.1 Flash Live, 0.8 points lower
How well it handled being talked over, 0 to 5.
Gemini 3.1 Flash Live, 0.01 higher
Median time to start replying after the caller finishes.
Azure Realtime, 1.22s sooner
One minute of call at the vendor's published rates.
Gemini 3.1 Flash Live, $0.009 cheaper
The small figure is the place among ranked models. The cascade is not ranked.
Azure Realtime 1.66s, Gemini 3.1 Flash Live 2.88s at the median.
Azure Realtime is more reliable, by 8.5 points. Azure Realtime passed 58 of 82 scenarios on all three runs, and Gemini 3.1 Flash Live Preview passed 51. A scenario only counts when every run of it passed.
For a phone agent, Azure Realtime, since it gets more scenarios right on every run. Azure Realtime is ahead on reliability, success rate, agent responses, data accuracy and response time, and Gemini 3.1 Flash Live Preview on stalled calls, interruption and cost.
Azure Realtime, by 6.8 points. Azure Realtime saved everything exactly right on 86.1% of the calls that save data, and Gemini 3.1 Flash Live Preview on 79.2%. On Appointments, 94.2% against 96.5%. On Medicare, 65.2% against 34.8%. A call counts only when nothing is missing, wrong, extra or saved twice.
Yes. Azure Realtime starts replying 1.22s sooner at the median. Azure Realtime takes 1.66s at the median and 2.22s at p90; Gemini 3.1 Flash Live Preview takes 2.88s and 4.00s. Both are measured on the call audio, from the caller finishing to the agent starting to reply.
Gemini 3.1 Flash Live Preview, by 0.01 on a 0 to 5 scale. Azure Realtime scores 4.96 and Gemini 3.1 Flash Live Preview 4.98 for how well the agent handled being talked over.
Gemini 3.1 Flash Live Preview, by 0.8 points. The agent went silent for 10 seconds or more on 4.1% of Azure Realtime calls and 3.3% of Gemini 3.1 Flash Live Preview calls.
Gemini 3.1 Flash Live Preview is $0.009 cheaper a minute. Azure Realtime costs $0.080 a minute of call and Gemini 3.1 Flash Live Preview $0.070, at each vendor's published rates.
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.
