Grok Voice tops Speech Agent Arena with 94.6% task success rate, beating Gemini and GPT
XFreeze · x · 2026-09-17
Grok Voice "Think Fast 2.0" from xAI ranks #1 on Artificial Analysis' Speech Agent Arena with a 94.6% task success rate, ahead of Gemini 3.8 Live, GPT-Realtime-2.1 High, and other tested voice agents.
The benchmark uses real people talking to hidden voice agents on practical tasks, then verifies whether the AI understood the request, used the right tools, and actually completed the job — measuring task completion rather than just human-likeness.
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