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About

Grok Voice Think Fast 2.0 is xAI’s flagship voice model for building real-time assistants, phone agents, and interactive voice systems that stream audio and text bidirectionally over WebSocket. Developers can configure system instructions, high or no reasoning effort, built-in or custom voices, automatic server-side voice activity detection, silence duration, idle re-engagement, playback speed, and session resumption after temporary disconnects. It accepts PCM, G.711 μ-law, G.711 A-law, and Opus audio through JSON or raw binary frames, with configurable PCM sample rates from telephone quality to 48 kHz. It supports more than 20 languages with native-quality accents, automatic language detection, natural responses in the speaker’s language, and seamless code-switching. Language hints and up to 100 key terms improve transcription of regional speech, names, products, codes, addresses, and specialized terminology, while pronunciation replacements correct spoken output.

About

Tadeus embeds a real-time AI voice agent inside the moments that decide whether work changes: HCM rollouts, software implementations, AI adoption, onboarding, compliance, and research. One agent interviews the whole workforce in 70+ languages, verifies and acts mid-conversation, and returns structured records via API and webhooks. Voice only, no audio retained, no emotion inference; built clear of the EU AI Act line from day one.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Developers, AI voice teams, contact center platforms, phone agent builders, customer support teams, product teams, enterprise automation teams, and conversational AI companies that need real-time voice assistants, bidirectional WebSocket audio, multilingual speech, voice activity detection, session resumption, custom voices, transcription tuning, and pronunciation control

Audience

User roles / teams (who deploys it): HCM & payroll platform product teams (embed Tadeus as a layer) Enterprise implementation / systems-integration teams (requirements gathering at scale) AI enablement & change-management teams (adoption measurement) HR / People & Culture (onboarding, compliance comprehension, benefits/enrolment, exit & stay interviews, policy/change) Product & UX research teams Market research & insights teams Developers / ISVs building on top via API + webhooks Organisation types (who buys it): HCM, payroll & workforce platforms (embed/OEM partners — the primary category) Systems integrators & implementation consultancies Large & global enterprises running multi-country software rollouts Global brands / multinationals needing one comparable dataset across markets Regulated enterprises needing EU AI Act–clean, GDPR-aligned deployments Mid-market SaaS & product companies (research/UX application) Industries: HR Tech / workforce & payroll software Enterprise software & SaaS Systems integration & management consulting Financial services & fintech (regulated) Healthcare & life sciences Manufacturing, logistics & retail (large distributed/frontline workforces) Public sector & government (multilingual workforce) Market research & insights

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

No images available

Pricing

No information available.
Free Version
Free Trial

Pricing

£10/month
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

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Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

SpaceXAI
Founded: 2023
United States
docs.x.ai/developers/model-capabilities/audio/speech-to-speech

Company Information

Tadeus
Founded: 2025
United Kingdom
www.tadeus.net

Alternatives

Alternatives

Voxtral TTS

Voxtral TTS

Mistral AI

Categories

Categories

Integrations

Grok
Grok Voice Agent
Grok Voice Agent Builder
Vercel AI Gateway

Integrations

Grok
Grok Voice Agent
Grok Voice Agent Builder
Vercel AI Gateway
Claim Grok Voice Think Fast 2.0 and update features and information
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