Amazon Nova 2 Sonic vs Phonic v1

Phonic v1 is more reliable, by 40.2 points. Amazon Nova 2 Sonic passed 41 of 82 scenarios on all three runs, and Phonic v1 passed 74. A scenario only counts when every run of it passed.

For a voice agent, Phonic v1, since it gets more scenarios right on every run. Phonic v1 is ahead on reliability, success rate, agent responses, data accuracy, calls where the agent went quiet and response time, and Amazon Nova 2 Sonic on interruption.

Phonic v1, by 37.5 points. Amazon Nova 2 Sonic saved everything exactly right on 59.9% of the calls that save data, and Phonic v1 on 97.5%. On Booking calls, 82.5% against 100.0%. On Medicare calls, 1.5% against 90.9%. A call counts only when nothing is missing, wrong, extra or saved twice.

No. Phonic v1 starts replying 0.55s sooner at the median. Amazon Nova 2 Sonic takes 2.18s at the median and 2.76s at p90; Phonic v1 takes 1.63s and 1.81s. Both are measured on the call audio, from the caller finishing to the agent starting to reply.

Amazon Nova 2 Sonic, by 0.11 on a 0 to 5 scale. Amazon Nova 2 Sonic scores 4.99 and Phonic v1 4.88 for how well the agent handled being talked over.

Phonic v1, by 1.2 points. The agent went quiet for 10 seconds or more on 1.2% of Amazon Nova 2 Sonic calls and 0.0% of Phonic v1 calls.

There is no verified per-minute rate for Amazon Nova 2 Sonic, so cost cannot be compared yet.

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, 3,690 calls across the benchmark. A call passes only when the agent said the right things and saved the right data.