SpaceXAI launches Grok Voice Think Fast 2.0 on Agent Builder
The new Grok voice model is faster, scores higher on speech-agent benchmarks, and will replace the current `grok-voice-latest` alias on August 5.
Think Fast 2.0 costs $0.08 per audio minute and is aimed at developers building voice agents. xAI says it improves intelligence, transcription, conversation quality, and tool use without requiring prompt changes. Artificial Analysis scored it 82.9% overall, up from 75.7% for version 1.0, while time to first audio fell to 0.70 seconds. Developers who need the old model must pin `grok-voice-think-fast-1.0` before the alias moves. TestingCatalog's note
Think Fast 2.0 costs $0.08 per audio minute and is aimed at developers building voice agents. xAI says it improves intelligence, transcription, conversation quality, and tool use without requiring prompt changes. Artificial Analysis scored it 82.9% overall, up from 75.7% for version 1.0, while time to first audio fell to 0.70 seconds. Developers who need the old model must pin `grok-voice-think-fast-1.0` before the alias moves. TestingCatalog's note
score 5