Eleven v4ElevenLabs
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Grok Voice Think Fast 2.0SpaceXSI
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Related Products
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About
Eleven v4 is a text-to-speech model from ElevenLabs for generating expressive spoken audio from written scripts. It supports multi-speaker dialogue, emotional direction and audio-event tags, voice cloning, and consistent speaker identity across generated scenes. Creators, publishers, and production teams can use it for narration, audiobooks, character dialogue, video and game voiceovers, and multilingual projects. Developers can generate speech through the ElevenLabs web application or API; the related Eleven v4 Turbo model is intended for real-time speech and voice-agent scenarios. Eleven v4 supports 90+ languages. A free plan includes monthly credits for personal use, while paid plans provide higher credit limits and additional features.
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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.
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Supported
iPad
Supported
Android
Not Supported
Chromebook
Not Supported
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Audience
Content creators, publishers, production teams, and developers who need expressive multilingual narration, dialogue, voiceovers, or real-time speech and voice-agent experiences.
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Audience
Developers seeking to build low-latency voice agents that hold real-time speech conversations and use tools during interactions
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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API
Offers API
Supported
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API
Offers API
Supported
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Screenshots and Videos |
Screenshots and Videos |
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Pricing
$0
Free plan: $0/month with 10,000 monthly credits for personal use. Paid plans start at $6/month with 30,000 monthly credits and a commercial license; Enterprise pricing is custom.
Free Version
Supported
Free Trial
Not Supported
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Pricing
No information available.
Free Version
Not Supported
Free Trial
Not Supported
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Reviews/
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Reviews/
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Training
Documentation
Supported
Webinars
Supported
Live Online
Supported
In Person
Not Supported
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Company InformationElevenLabs
Founded: 2022
United Kingdom
elevenlabs.io/v4
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Company InformationSpaceXSI
Founded: 2023
United States
docs.x.ai/developers/model-capabilities/audio/speech-to-speech
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Alternatives |
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Categories |
Categories |
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Integrations
ElevenAgents
Supported
ElevenCreative
Supported
ElevenLabs
Supported
Grok
Not Supported
Grok Voice Agent
Not Supported
Grok Voice Agent Builder
Not Supported
Vercel AI Gateway
Not Supported
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Integrations
ElevenAgents
Not Supported
ElevenCreative
Not Supported
ElevenLabs
Not Supported
Grok
Supported
Grok Voice Agent
Supported
Grok Voice Agent Builder
Supported
Vercel AI Gateway
Supported
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