xAI officially introduces Grok Voice Think Fast 1.0; Grok Voice is also used by Starlink

Yesterday, xAI introduced its new flagship voice model- Grok Voice Think Fast 1.0.

Introducing Grok Voice Think Fast 1.0

A state-of-the-art voice model built for complex, multi-step workflows with snappy responses and high accuracy.

It takes the top spot on the Tau Voice Bench and handles real-world messiness like noise, accents, and interruptions better than…

— xAI (@xai) April 23, 2026

Grok Voice Think Fast 1.0

This new model is said to excel at complex, ambiguous, multi-step workflows across customer support, sales, and enterprise applications. It is especially well-suited for high-stakes scenarios that demand precise data entry and high-volume tool calling to address the user’s request.

The company has built this model through tight collaborations and partners like Starlink to combine top-tier intelligence with low response latency and organic conversational ability. It is revealed that this new model takes the top spot on the τ-voice Bench leaderboard, which evaluates full-duplex voice agents under realistic conditions, including noise, accents, interruptions and turn-taking.

The model has been battle-tested in the toughest real-world conditions: telephony audio, background noise, heavy accents, and frequent interruptions. It natively supports 25+ languages, making it ideal for global deployments.

Grok voice is able to seamlessly collect email addresses, physical street addresses, phone numbers, full names, account numbers, and other structured data. It gracefully handles speech disfluencies and accepts natural corrections as a human would.

Grok Voice Think Fast performs reasoning in the background, allowing it to think through challenging queries and workflows in real-time with no impact on response latency. The new model is built to reason through edge cases before responding, catching obvious mistakes that other models get wrong.

Grok Voice used by Starlink

Elon Musk has officially announced that Grok Voice is used by Starlink.

Grok Voice is used by @Starlink https://t.co/3PEzU0krpU

— Elon Musk (@elonmusk) April 24, 2026

Grok Voice enables Starlink’s phone sales and customer support experience at +1 (888) GO STARLINK. This requires working across numerous languages, helping customers through customer support scenarios, and onboarding new customers via sales:

• 20% conversion rate. In 1 out of every 5 of sales inquiries, the customer purchases the Starlink service while on the phone with Grok.
• 70% resolution rate. The majority of customer support inquiries are resolved autonomously by the Grok Voice agent with no human in the loop.
• 28 tools. This single agent uses dozens of distinct tools across hundreds of support and sales workflows.
• Accuracy is critical. Grok handles high-stakes decisions; the model autonomously performs hardware troubleshooting workflows, issues hardware replacements, and grants service credits.