Grok Voice Think Fast 2.0vsGrok Voice 3.0

Grok Voice 3.0 is more reliable, by 14.6 points. Grok Voice Think Fast 2.0 passed 55 of 82 scenarios on all three runs, and Grok Voice 3.0 passed 67. A scenario only counts when every run of it passed.

For a voice agent, Grok Voice 3.0, since it gets more scenarios right on every run. Grok Voice 3.0 is ahead of Grok Voice Think Fast 2.0 on reliability, success rate, agent responses, data accuracy, calls where the agent went quiet, interruption and response time. The two tie on cost.

Grok Voice 3.0, by 8.4 points. Grok Voice Think Fast 2.0 saved everything exactly right on 78.9% of the calls that save data, and Grok Voice 3.0 on 87.3%. On Booking calls, 97.1% against 98.2%. On Medicare calls, 31.8% against 59.1%. A call counts only when nothing is missing, wrong, extra or saved twice.

No. Grok Voice 3.0 starts replying 0.28s sooner at the median. Grok Voice Think Fast 2.0 takes 1.62s at the median and 1.94s at p90; Grok Voice 3.0 takes 1.34s and 1.62s. Both are measured on the call audio, from the caller finishing to the agent starting to reply.

Grok Voice 3.0, by 0.06 on a 0 to 5 scale. Grok Voice Think Fast 2.0 scores 4.92 and Grok Voice 3.0 4.98 for how well the agent handled being talked over.

Grok Voice 3.0, by 4.5 points. The agent went quiet for 10 seconds or more on 4.5% of Grok Voice Think Fast 2.0 calls and 0.0% of Grok Voice 3.0 calls.

They cost the same. Grok Voice Think Fast 2.0 costs $0.080 a minute of call and Grok Voice 3.0 $0.080, 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, 3,198 calls across the benchmark. A call passes only when the agent said the right things and saved the right data.