Eleven RealtimeElevenLabs
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Grok Voice Think Fast 2.0SpaceXSI
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Related Products
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About
Eleven Realtime is a developer-facing speech-to-speech API for adding live voice conversations to applications and AI agents. It combines speech recognition, turn-taking, language-model reasoning, and voice generation, with Mini and Max model options for different conversational needs. Developers can use the models through the Realtime API or select them in ElevenAgents. The streaming interface is designed for interactive voice experiences, including assistants, customer support, tutors, and interactive characters. Agent configurations can include prompts, voices, tools, knowledge bases, and conversation flows. Realtime usage is billed per minute plus model input and output tokens. The product is intended for developers and organizations building real-time conversational applications and voice-enabled customer experiences.
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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
Not Supported
iPad
Not 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
Developers and organizations building low-latency voice-enabled applications and AI agents, including conversational customer 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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PricingRealtime agents are billed at the standard ElevenAgents per-minute rate plus input, cached-input, and output-token charges for the selected model. Eleven Realtime v1 Max costs more per token than Mini; rates vary by plan and model.
Free Version
Not 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
Not Supported
Live Online
Not 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 States
elevenlabs.io/realtime
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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
ElevenLabs
Supported
Grok
Not Supported
Grok Voice Agent
Not Supported
Grok Voice Agent Builder
Not Supported
OpenAI
Supported
Vercel AI Gateway
Not Supported
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Integrations
ElevenLabs
Not Supported
Grok
Supported
Grok Voice Agent
Supported
Grok Voice Agent Builder
Supported
OpenAI
Not Supported
Vercel AI Gateway
Supported
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