May 13, 2026 · Artificial Intelligence

First End‑to‑End Voice Agent Benchmark Shows Grok Leads with 52% Real‑World Success Rate

Artificial Analysis released the τ‑Voice benchmark, testing speech‑to‑speech agents across 278 real‑world customer‑service scenarios, and found the top‑performing Grok Voice Think Fast 1.0 achieves only a 52.1% task‑completion rate while average dialogue lengths stay under seven minutes.

BenchmarkGrok Voicespeech-to-speech

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First End‑to‑End Voice Agent Benchmark Shows Grok Leads with 52% Real‑World Success Rate