Grok Voice Think Fast 2.0 vs Higgs Realtime

Grok Voice Think Fast 2.0 is more reliable, by 11.0 points. Grok Voice Think Fast 2.0 passed 55 of 82 scenarios on all three runs, and Higgs Realtime passed 46. A scenario only counts when every run of it passed.

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

Grok Voice Think Fast 2.0, by 12.7 points. Grok Voice Think Fast 2.0 saved everything exactly right on 78.9% of the calls that save data, and Higgs Realtime on 66.2%. On Booking calls, 97.1% against 91.8%. On Medicare calls, 31.8% against 0.0%. A call counts only when nothing is missing, wrong, extra or saved twice.

Yes. Grok Voice Think Fast 2.0 starts replying 0.32s sooner at the median. Grok Voice Think Fast 2.0 takes 1.62s at the median and 1.94s at p90; Higgs Realtime takes 1.94s and 2.02s. Both are measured on the call audio, from the caller finishing to the agent starting to reply.

Higgs Realtime, by 0.08 on a 0 to 5 scale. Grok Voice Think Fast 2.0 scores 4.92 and Higgs Realtime 5.00 for how well the agent handled being talked over.

Higgs Realtime, by 3.3 points. The agent went quiet for 10 seconds or more on 4.5% of Grok Voice Think Fast 2.0 calls and 1.2% of Higgs Realtime calls.

Higgs Realtime is $0.0739 cheaper a minute. Grok Voice Think Fast 2.0 costs $0.0800 a minute of call and Higgs Realtime $0.0061, 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, 3,690 calls across the benchmark. A call passes only when the agent said the right things and saved the right data.