xAI AI Updates: August 6, 2026

1. Grok Voice Think Fast 2.0 Becomes xAI’s Default Voice Model

xAI. xAI’s release notes confirm that grok-voice-latest began routing to grok-voice-think-fast-2.0 on August 5, 2026, making the upgraded speech-to-speech model the default for voice applications. The model adds improved intelligence, higher transcription accuracy, and stronger conversational quality, and xAI reported gains in sales-conversion and support-containment rates during A/B testing on Starlink. Source