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What is Open Voice OS?

Open Voice OS stands as a community-driven, open-source voice AI platform that facilitates the creation of tailored voice-controlled interfaces across a variety of devices, focusing on natural language understanding, adaptable user interfaces, and robust privacy and security protocols. Developed by a diverse group of contributors from Linux and free software sectors, it aims to provide an accessible environment for the evolution of groundbreaking voice assistance technologies for everyone. This adaptable platform supports numerous devices, including embedded headless systems, single-board computers with displays, DIY smart speakers, Raspberry Pi units, and both Mark I and Mark II hardware while also being compatible with Linux desktops, laptops, and Docker containers. As a holistic voice operating system, Open Voice OS goes beyond the traditional "Hey Mycroft..." model, equipping developers with vital tools and frameworks to enable smooth voice integration across various applications, from robotics and automation to smart furniture, interactive mirrors, cloud-based voice services, embedded systems, and smart TVs. The ongoing contributions from its vibrant community guarantee that the platform continually evolves, maintaining its leadership in voice technology and fostering innovation that benefits all users. This collaborative spirit not only enhances the user experience but also ensures that the platform remains adaptable to future advancements in voice AI.

What is Grok Voice Think Fast 2.0?

Grok Voice Think Fast 2.0 is xAI’s flagship voice model for creating real-time AI assistants, phone agents, and interactive voice applications. The model is designed to stream both audio and text bidirectionally over WebSocket for low-friction conversational experiences. Developers can use it to build systems that listen, respond, reason, and adapt during live voice interactions. Grok Voice Think Fast 2.0 supports configurable system instructions so teams can shape behavior, persona, policies, and task handling. It also allows developers to choose high reasoning effort or no reasoning effort depending on latency, cost, and complexity requirements. The model supports built-in voices, custom voices, playback speed controls, automatic server-side voice activity detection, silence duration settings, idle re-engagement, and session resumption after temporary disconnects. It accepts PCM, G.711 μ-law, G.711 A-law, and Opus audio through JSON frames or raw binary frames. Configurable PCM sample rates let teams support use cases ranging from telephone-quality voice calls to 48 kHz audio workflows. Grok Voice Think Fast 2.0 supports more than 20 languages with native-quality accents, automatic language detection, natural responses in the speaker’s language, and seamless code-switching. Developers can provide language hints and up to 100 key terms to improve recognition of regional speech, names, products, codes, addresses, and specialized terminology. By combining real-time audio streaming, configurable reasoning, voice controls, multilingual support, transcription tuning, and pronunciation replacement, Grok Voice Think Fast 2.0 gives developers a flexible foundation for advanced voice AI products.

Media

Media

Integrations Supported

Docker
Grok
Grok Voice Agent
Grok Voice Agent Builder
Python
Vercel AI Gateway

Integrations Supported

Docker
Grok
Grok Voice Agent
Grok Voice Agent Builder
Python
Vercel AI Gateway

API Availability

Has API

API Availability

Has API

Pricing Information

Free
Free Version
Free Trial Offered?

Pricing Information

Pricing not provided
Free Version
Free Trial Offered?

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Open Voice OS

Date Founded

2024

Company Location

Netherlands

Company Website

www.openvoiceos.org

Company Facts

Organization Name

SpaceXAI

Date Founded

2023

Company Location

United States

Company Website

docs.x.ai/developers/model-capabilities/audio/speech-to-speech

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