CekuraBench

GPT-Live 1 + GPT-6 SolvsGrok Voice Think Fast 2.0

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GPT-Live 1 + GPT-6 SolOpenAI
Wins 5 of 8
Reliability
75.6%
Response time
2.02s
Cost / min
$0.055
Grok Voice Think Fast 2.0xAI
Wins 3 of 8
Reliability
67.1%
Response time
1.62s
Cost / min
$0.080

GPT-Live 1 + GPT-6 Sol is ahead on reliability, success rate, agent responses, data accuracy and cost, and Grok Voice Think Fast 2.0 on calls where the agent went quiet, interruption and response time.

Last updated Methodology by Dileep Chagam

Who is better at what

GPT-Live 1 + GPT-6 SolGrok Voice Think Fast 2.0
  • Reliability75.6%67.1%
  • Success rate83.7%76.0%
  • Agent responses100.0%96.7%
  • Data accuracy89.0%78.9%
  • Went quiet12.2%4.5%
  • Interruption4.894.92
  • Response time2.02s1.62s
  • Cost / min$0.055$0.080

Results by call

Right every time, on booking and Medicare calls

Booking callsMedicare calls
  1. 92%
    35%
    GPT-Live 1 + GPT-6 Sol
  2. 92%
    4%
    Grok Voice Think Fast 2.0

Related comparisons

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GPT-Live 1 + GPT-6 Sol vs Grok Voice Think Fast 2.0 FAQ

  • GPT-Live 1 + GPT-6 Sol is more reliable, by 8.5 points. GPT-Live 1 + GPT-6 Sol passed 62 of 82 scenarios on all three runs, and Grok Voice Think Fast 2.0 passed 55. A scenario only counts when every run of it passed.

  • For a voice agent, GPT-Live 1 + GPT-6 Sol, since it gets more scenarios right on every run. GPT-Live 1 + GPT-6 Sol is ahead on reliability, success rate, agent responses, data accuracy and cost, and Grok Voice Think Fast 2.0 on calls where the agent went quiet, interruption and response time.

  • GPT-Live 1 + GPT-6 Sol, by 10.1 points. GPT-Live 1 + GPT-6 Sol saved everything exactly right on 89.0% of the calls that save data, and Grok Voice Think Fast 2.0 on 78.9%. On Booking calls, 100.0% against 97.1%. On Medicare calls, 60.6% against 31.8%. A call counts only when nothing is missing, wrong, extra or saved twice.

  • No. Grok Voice Think Fast 2.0 starts replying 0.40s sooner at the median. GPT-Live 1 + GPT-6 Sol takes 2.02s at the median and 2.42s at p90; Grok Voice Think Fast 2.0 takes 1.62s and 1.94s. Both are measured on the call audio, from the caller finishing to the agent starting to reply.

  • Grok Voice Think Fast 2.0, by 0.03 on a 0 to 5 scale. GPT-Live 1 + GPT-6 Sol scores 4.89 and Grok Voice Think Fast 2.0 4.92 for how well the agent handled being talked over.

  • Grok Voice Think Fast 2.0, by 7.7 points. The agent went quiet for 10 seconds or more on 12.2% of GPT-Live 1 + GPT-6 Sol calls and 4.5% of Grok Voice Think Fast 2.0 calls.

  • GPT-Live 1 + GPT-6 Sol is $0.025 cheaper a minute. GPT-Live 1 + GPT-6 Sol costs $0.055 a minute of call and Grok Voice Think Fast 2.0 $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.