xAI released grok-voice-think-fast-1.0 on April 25, a full-duplex voice agent built for complex multi-step enterprise workflows. The model scores 67.3% on the τ-voice Bench, outperforming Gemini 3.1 Flash Live (43.8%) and GPT Realtime 1.5 (35.3%), with particularly strong results in telecom workflows at 73.7%. The model already powers Starlink's entire phone sales and support operation, achieving a 20% sales conversion rate and resolving 70% of support inquiries without human intervention. It supports 25+ languages, integrates with up to 28 tools per deployment, and is available via the xAI API.