xAI releases Grok Voice Transcribe 2.0 at unchanged API prices
xAI says Grok Voice Transcribe 2.0 improves accuracy over version 1.0 without changing its Speech-to-Text API prices. Batch transcription costs $0.10 per audio hour and streaming costs $0.20 per audio hour; xAI says the new model will soon become the default and version 1.0 will be deprecated in the coming weeks.
SessionWatcher editorial · Published · Updated · Source announcement: 2026-09-18
Accuracy and features
xAI announced Grok Voice Transcribe 2.0 on September 18, 2026, as an update to its speech-to-text model. The company says it is twice as accurate as version 1.0 at the same price, and ranks first among 32 streaming models on the Artificial Analysis leaderboard.
The model supports batch and streaming transcription, word-level timestamps, speaker diarization, up to eight independent audio channels, key-term biasing, and automatic language detection. xAI says existing Speech-to-Text API integrations receive the accuracy improvement without code changes.
API pricing and transition
Pricing is unchanged: batch transcription costs $0.10 per hour of audio, while streaming costs $0.20 per hour. xAI says diarization, timestamps, and key terms are included.
xAI says version 2.0 will soon become the default in the Speech-to-Text API and version 1.0 will be deprecated in the coming weeks. To remain on version 1.0 during the transition, pin the model identifier grok-voice-transcribe-1.0.
AI assisted reporting, checked against the linked official sources. Source pages checked 2026-09-30. Editorial process and corrections.