xAI's Grok Voice Think Fast 2.0 slashes response time to 0.7s, cuts tokens 60%
Faster audio responses and better transcription, but at a higher price per minute.
Deep Dive
SpaceXAI launched Grok Voice Think Fast 2.0 on July 29, 2026. The upgrade delivers a 0.70-second first audio response, uses 60% fewer reasoning tokens, and improves transcription accuracy by 1.4x compared to Grok Voice Think Fast 1.0 from April 2026. Pricing rose to $0.08/min from $0.05/min. Real-world tests on Starlink support and sales calls before public release reportedly showed improved conversion and containment rates.
Key Points
- First audio response improved to 0.70 seconds, down from ~1.5 seconds in v1.
- Reasoning tokens reduced by 60%, enabling faster and cheaper inference.
- Pricing increased to $0.08 per minute, with real-world tests boosting Starlink sales conversion and support containment.
Why It Matters
Faster, cheaper voice AI can transform customer support and real-time interactions, but higher costs may limit adoption for startups.