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features
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Description

Grok Voice Think Fast 2.0 stands as the premier voice model from xAI, designed for the creation of real-time assistants, telephone agents, and interactive voice systems capable of bidirectional audio and text streaming via WebSocket. Developers have the flexibility to tailor various system parameters, such as the level of reasoning effort, the choice between built-in or custom voices, automatic voice activity detection on the server side, as well as configurable settings for silence duration, idle re-engagement, playback speed, and the ability to resume sessions following temporary disconnections. The model processes audio in several formats, including PCM, G.711 μ-law, G.711 A-law, and Opus, accepting both JSON and raw binary frames, with the adaptability to adjust PCM sample rates ranging from standard telephone quality to 48 kHz. It boasts support for over 20 languages with native-like accents, features automatic language recognition, generates natural responses in the user's preferred language, and facilitates smooth code-switching. Additionally, the inclusion of language hints and the ability to incorporate up to 100 key terms significantly enhance the accuracy of transcribing regional dialects, names, product identifiers, codes, addresses, and other specialized vocabulary, while pronunciation adjustments ensure the spoken output is correct and intelligible. This versatility makes Grok Voice Think Fast 2.0 an invaluable tool for developers looking to enhance user interaction through voice technology.

Description

GPT-Realtime, OpenAI's latest and most sophisticated speech-to-speech model, is now available via the fully operational Realtime API. This model produces audio that is not only highly natural but also expressive, allowing users to finely adjust elements such as tone, speed, and accent. It is capable of understanding complex human audio cues, including laughter, can switch languages seamlessly in the middle of a conversation, and accurately interprets alphanumeric information such as phone numbers in various languages. With a notable enhancement in reasoning and instruction-following abilities, it has achieved impressive scores of 82.8% on the BigBench Audio benchmark and 30.5% on MultiChallenge. Additionally, it features improved function calling capabilities, demonstrating greater reliability, speed, and accuracy, with a score of 66.5% on ComplexFuncBench. The model also facilitates asynchronous tool invocation, ensuring that dialogues flow smoothly even during extended calls. Furthermore, the Realtime API introduces groundbreaking features like support for image input, integration with SIP phone networks, connections to remote MCP servers, and the ability to reuse conversation prompts effectively. These advancements make it an invaluable tool for enhancing communication technology.

API Access

Has API Yes 

API Access

Has API Yes 

Screenshots View All

Screenshots View All

Integrations

Azure Voice Live API No 
ChatGPT No 
GPT-Realtime-1.5 No 
GPT-Realtime-2 No 
GPT-Realtime-2.1 No 
GPT-Realtime-Translate No 
GPT‑Realtime‑Whisper No 
Grok Yes 
Grok Voice Agent Yes 
Grok Voice Agent Builder Yes 
Microsoft Foundry Models No 
OpenAI No 
SmartCallz No 
Vercel AI Gateway Yes 

Integrations

Azure Voice Live API Yes 
ChatGPT Yes 
GPT-Realtime-1.5 Yes 
GPT-Realtime-2 Yes 
GPT-Realtime-2.1 Yes 
GPT-Realtime-Translate Yes 
GPT‑Realtime‑Whisper Yes 
Grok No 
Grok Voice Agent No 
Grok Voice Agent Builder No 
Microsoft Foundry Models Yes 
OpenAI Yes 
SmartCallz Yes 
Vercel AI Gateway No 

Pricing Details

No price information available.
Free Trial No 
Free Version No 

Pricing Details

$20 per month
Free Trial No 
Free Version Yes 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours Yes 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person Yes 

Vendor Details

Company Name

SpaceXAI

Founded

2023

Country

United States

Website

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

Vendor Details

Company Name

OpenAI

Founded

2015

Country

United States

Website

openai.com/index/introducing-gpt-realtime/

Product Features

Alternatives

Alternatives