The trick: Self-Marked
xAI proved its voice agent sells more product.
The product it tested on was its sister company.
xAI says Grok Voice Think Fast 2.0 hits 0.70s to first audio, transcribes 1.4x more accurately, uses about 60% fewer reasoning tokens, and lifted sales conversion in a Starlink A/B test, positioning it as its most capable speech-to-speech model for enterprise voice agents
Before you read on. Your call?
TRUE, BUT
0.70s
The 0.70 second latency is real and independently measured. Everything after that sentence is xAI grading xAI, on a meter that now bills 60% more per minute.
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The trick has a name
We call it Self-Marked: graded by the party that benefits from the grade. You'll see it again. Learn to spot it →
Receipts
- Supports x.ai:
we've seen a significant increase in sales conversion rate and support containment rate
- Supports x.ai:
a 1.4× improvement relative to Grok Voice Think Fast 1.0
- Refutes orcarouter.ai:
The Starlink A/B results, transcription multipliers, and speed framing are xAI-reported with no published data
- Context orcarouter.ai:
It is also 60% more expensive per minute than the model it replaces
- Context explainx.ai:
grok-voice-latest flips to 2.0 on August 5, 2026
Open the Receipts Pack → What each source proves, every figure traced, and what would change our verdict.