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xAI Touts Grok Voice's Performance and $3-per-Hour Pricing

June 10, 2026 at 14:32 EDT

Foundation Models
AI Agents

On June 10, 2026, xAI publicly emphasized that its voice agent API "Grok Voice" delivers human-like timing, tone, and warmth while costing a fraction of competitors' prices. The company pointed developers to its Voice API overview page in a renewed pitch.

June 10, 2026 · xAI

Grok Voice: State-of-the-Art Speech at a Fraction of the Price

xAI's full voice stack — Voice Agent, TTS and STT — claims human-like timing, tone and warmth. Its flagship Grok Voice Think Fast 1.0 reaches the Pareto frontier on EVA-Bench while undercutting rivals on cost.

25+

languages with natural intonation

80+

TTS voices available

<1s

sub-second, full-duplex response

<60s

audio to clone a Custom Voice

Roughly Half the Cost of OpenAI Realtime

Realtime Voice Agent pricing, per minute — drawn to scale.

~$0.10

OpenAI
Realtime

$0.05

Grok
Voice Agent

$0.05 / min = $3.00 / hr · cited as roughly half the cost of OpenAI Realtime

TTS

$15.00 / 1M chars

STT — batch

$0.10 / hr

STT — streaming

$0.20 / hr

Real-World Deployment · Starlink Support & Sales

70%

resolution rate on support inquiries

20%

conversion rate on sales inquiries

tools orchestrated — troubleshooting, hardware, credits

▲ What developers like

Strong for complex workflows, attractively priced, and robust under noise, accents and interruptions on benchmarks.

▼ The open question

Tool-calling accuracy is decisive for ambiguous real-world requests; detailed general-user accounts remain limited.

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