Grok Voice Think Fast 2.0 vs Grok Voice 3.0

Grok Voice 3.0 is more reliable, by 14.3 points. Grok Voice Think Fast 2.0 handled 20 of 70 real callers well on all three runs, and Grok Voice 3.0 30. A caller only counts when every run of the call scored 80 or more.

For a voice agent, Grok Voice 3.0, since it handles more real callers well on every run. Grok Voice 3.0 is ahead on ELO rating, hearing score, turn taking score, speaking score, task handling score, reliability, calls handled well, calls fully resolved and calls where the agent went quiet, and Grok Voice Think Fast 2.0 on median latency. The two tie on cost.

Grok Voice 3.0, by 11.9 points higher. Grok Voice Think Fast 2.0 fully resolved 22.9% of calls and Grok Voice 3.0 34.8%. A call counts only when every step the caller needed was done.

Yes. Grok Voice Think Fast 2.0 starts replying 0.16s sooner at the median. Grok Voice Think Fast 2.0 takes 1.44s at the median and 1.83s at p90; Grok Voice 3.0 takes 1.60s and 1.94s. Both are measured on the call audio, from the caller finishing to the agent starting to reply.

Grok Voice 3.0, by 1.4 points. The agent went quiet for 10 seconds or more on 8.6% of Grok Voice Think Fast 2.0 calls and 7.1% 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 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.