xAI's Grok Voice 3.0 Achieves Top Ranking on Speech-to-Speech Benchmarks

xAI has unveiled Grok Voice 3.0, a speech-to-speech AI model that achieved the highest score on multiple voice-agent benchmarks, marking a significant advance in real-time voice AI capabilities. Released on October 14, 2026, Grok Voice 3.0 ranks first on the Artificial Analysis Speech-to-Speech Index with a score of 86.9, surpassing OpenAI's GPT-Live-1 at 83.2 and Google's Gemini 3.8 Live at 82.6. The model represents a substantial improvement over its predecessor, Grok Voice Think Fast 2.0, which scored 82.9 on the same index.