Grok Voice Think Fast 1.0 tops τ-voice Bench at 67.3%, beats Gemini and GPT Realtime

xAI launched Grok Voice Think Fast 1.0 via API, topping the τ-voice benchmark at 67.3% across retail, airline, and telecom multi-step workflows — beating Gemini, GPT Realtime, and its own predecessor. Tesla integration in Model Y vehicles continues with FSD-assist beta testing.