Grok Voice 3.0

Grok Voice 3.0

SpaceXSI
Inworld TTS

Inworld TTS

Inworld
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About

Grok Voice 3.0 is a speech-to-speech model offered through the Grok Voice Agent API for developers building real-time voice applications. It accepts audio and text and returns spoken audio or text through a WebSocket session, supporting conversational turn-taking, interruptions, and function calling. Developers can connect the model to custom functions and server-side tools, including web search, X search, collections, and remote MCP servers. The API is intended for interactive voice agents such as customer-support and service-call experiences, and is also used for voice interactions in Tesla vehicles and Grok Bot. Billing is usage-based, with audio charged per minute and text input events billed separately. The API documentation includes setup instructions and examples for Python and JavaScript clients.

About

Inworld TTS is a state-of-the-art text-to-speech platform designed to deliver ultra-realistic, context-aware speech synthesis and precise voice-cloning capabilities at a radically accessible price. The flagship model, TTS-1, is optimized for real-time applications and supports low-latency streaming (first audio chunk in ≈200 ms) as well as multiple languages (including English, Spanish, French, Korean, Chinese, and more). Developers can use instant zero-shot voice cloning (5-15 seconds of audio) or professional fine-tuned cloning, add voice-tags for emotion, style, and non-verbal sounds, and switch languages while preserving voice identity. The larger TTS-1-Max model (in preview) offers even more expressive speech and multilingual strength. The platform supports both API and portal access, streaming or batch mode, and is designed for everything from interactive voice agents and gaming characters to branded audio experiences.

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

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Developers building real-time voice applications, phone agents, interactive voice systems, and customer-support experiences.

Audience

Developers and businesses looking for a tool offering multilingual voice synthesis and custom-voice cloning at scale

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

$0.08/min
Audio is $0.08 per minute. Text-only input events are $0.004 each. Server-VAD sessions are billed for the full session duration; push-to-talk sessions are billed for audio sent and received.
Free Version Not Supported
Free Trial Supported

Pricing

$0.005 per minute
Free Version Not Supported
Free Trial Not Supported

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

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 Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Supported
In Person Not Supported

Company Information

SpaceXSI
Founded: 2023
United States
x.ai/api/voice

Company Information

Inworld
Founded: 2021
United States
inworld.ai/tts

Alternatives

Alternatives

Qwen3-TTS

Qwen3-TTS

Alibaba
Chirp 3

Chirp 3

Google

Categories

AI Voice Models Supported

Categories

Integrations

Claude Not Supported
Fireworks AI Not Supported
Google AI Overviews Not Supported
Grok Supported
Grok Bot Supported
Grok Voice Agent Supported
Grok Voice Agent Builder Supported
Groq Not Supported
Inworld Not Supported
LiveKit Not Supported
Mistral AI Not Supported
Model Context Protocol (MCP) Supported
OpenAI Not Supported
Tenstorrent DevCloud Not Supported
Twilio Supported
Vapi AI Not Supported
gpt-oss-20b Not Supported

Integrations

Claude Supported
Fireworks AI Supported
Google AI Overviews Supported
Grok Not Supported
Grok Bot Not Supported
Grok Voice Agent Not Supported
Grok Voice Agent Builder Not Supported
Groq Supported
Inworld Supported
LiveKit Supported
Mistral AI Supported
Model Context Protocol (MCP) Not Supported
OpenAI Supported
Tenstorrent DevCloud Supported
Twilio Not Supported
Vapi AI Supported
gpt-oss-20b Supported
Claim Grok Voice 3.0 and update features and information
Claim Grok Voice 3.0 and update features and information
Claim Inworld TTS and update features and information
Claim Inworld TTS and update features and information