Phonic v1 vs Rime Prism

Phonic v1 is more reliable, by 22.0 points. Phonic v1 passed 74 of 82 scenarios on all three runs, and Rime Prism passed 56. 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 and data accuracy, and Rime Prism on interruption and response time. The two tie on calls where the agent went quiet.

Phonic v1, by 13.0 points. Phonic v1 saved everything exactly right on 97.5% of the calls that save data, and Rime Prism on 84.5%. On Booking calls, 100.0% against 92.4%. On Medicare calls, 90.9% against 64.2%. A call counts only when nothing is missing, wrong, extra or saved twice.

No. Rime Prism starts replying 0.29s sooner at the median. Phonic v1 takes 1.63s at the median and 1.81s at p90; Rime Prism takes 1.34s and 1.57s. Both are measured on the call audio, from the caller finishing to the agent starting to reply.

Rime Prism, by 0.03 on a 0 to 5 scale. Phonic v1 scores 4.88 and Rime Prism 4.91 for how well the agent handled being talked over.

They go quiet on the same share of calls. The agent went quiet for 10 seconds or more on 0.0% of Phonic v1 calls and 0.0% of Rime Prism calls.

There is no verified per-minute rate for Rime Prism, 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.