xAI released Grok Voice Transcribe 2.0, its latest speech-to-text model, on September 18, 2026, holding batch pricing at $0.10 per hour of audio while describing the model as twice as accurate as Grok Voice Transcribe 1.0. Grok Voice Transcribe 2.0 is built on the audio foundation model behind Grok Voice. According to xAI, Grok Voice already powers tens of thousands of customer-support calls a day, transcribes millions of hours of video narration, and runs voice agents in physical products…