Grok Voice Think Fast 2.0 has one number nobody disputes: 0.70 seconds to first audio, down from 1.25, the only sub-second figure among the top ranked voice models on Artificial Analysis, and independent testing broadly agrees. Credit where due; in voice, latency is the product.

The rest of the launch is a different genre. The 1.4x accuracy multiplier, the 60% fewer reasoning tokens, the 'nearly 5x faster' framing, and the headline enterprise result, 'a significant increase in sales conversion rate', ship without published data.

And the enterprise witness is Starlink. xAI now sits under the SpaceX umbrella, which makes the flagship customer testimonial an A/B test run on the family business. 'Significant increase' comes with no percentage, no sample size, no methodology.

Meanwhile the list price moved from $0.05 to $0.08 per minute, a 60% rise, and integrations pinned to 'grok-voice-latest' flipped onto the new model, and the new meter, automatically on August 5.

Fast is measured. Better-for-business is vibes with a relative.