Grok Voice Think Fast 2.0
2026-07-29 · Publisher : xAI · Domain : Artificial Intelligence
SpaceXAI launches Grok Voice Think Fast 2.0, a smarter speech-to-speech voice model, with first audio in 0.70 seconds and pricing of 0.08 USD per minute of audio.
What changes
- Overall quality index 82.9% versus 75.7% for version 1.0.
- Voice reasoning at 97.2% and conversational dynamics at 95.1%.
- Reasoning tokens reduced to 0.4 times those of 1.0; shorter sentences and fewer verbal tics.
- On August 5, 2026, the grok-voice-latest alias switches to this version.
### Specifications - API identifier: grok-voice-think-fast-2.0. - Modalities: bidirectional audio WebSocket with tool calls. - Availability: xAI API. ### Pricing | Item | Pricing | Note | |---|---|---| | Audio | 0.08 USD/minute (0.05 USD for 1.0) | - | ### Benchmarks | Metric | Score | |---|---| | Overall quality index | 82.9% | | Speech reasoning | 97.2% | | Conversational dynamics | 95.1% | | Time to first audio | 0.70 s | Scores published by the vendor. ### Key takeaways A 60% price increase per minute for better voice reasoning performance.
Links
Tags : Audio, xAI, Grok, Voix, SpaceXAI