Grok Voice Think Fast 2.0 vs Phonic-1

Phonic-1 is more reliable, by 2.9 points. Grok Voice Think Fast 2.0 handled 20 of 70 real callers well on all three runs, and Phonic-1 22. A caller only counts when every run of the call scored 80 or more.

For a voice agent, Phonic-1, since it handles more real callers well on every run. Phonic-1 is ahead on hearing score, task handling score, reliability, calls handled well and calls fully resolved, and Grok Voice Think Fast 2.0 on turn taking score, speaking score, calls where the agent went quiet and median latency. The two tie on ELO rating.

Phonic-1, by 1.9 points higher. Grok Voice Think Fast 2.0 fully resolved 22.9% of calls and Phonic-1 24.8%. A call counts only when every step the caller needed was done.

Yes. Grok Voice Think Fast 2.0 starts replying 0.55s sooner at the median. Grok Voice Think Fast 2.0 takes 1.44s at the median and 1.83s at p90; Phonic-1 takes 1.99s and 2.32s. Both are measured on the call audio, from the caller finishing to the agent starting to reply.

Grok Voice Think Fast 2.0, by 2.4 points. The agent went quiet for 10 seconds or more on 8.6% of Grok Voice Think Fast 2.0 calls and 11.0% of Phonic-1 calls.

There is no verified per-minute rate for Phonic-1, so cost cannot be compared yet.

Cekura ran both as the whole agent with the same prompt, tools and phone connection. Both took the same 70 recorded real human callers on live calls, three times each. Each call is graded on 25 skills across Hearing, Turn Taking, Task Handling and Speaking, and passes at a score of 80 out of 100.