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features
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support

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Description

OpenAI’s GPT-Realtime-Whisper is an innovative streaming transcription model designed to deliver low-latency speech-to-text capabilities for live applications. This technology captures audio in real-time as individuals talk, enhancing voice-enabled applications by making them feel quicker, more engaging, and seamless, whether it’s by providing instant captions or generating meeting notes that align with ongoing discussions. By enabling the use of live speech in business processes, it allows teams to facilitate captions for various scenarios, including meetings, classrooms, broadcasts, and events, while also crafting notes and summaries during the dialogue. Moreover, it supports the development of voice agents that must continuously comprehend user input and expedites follow-up workflows for interactions that involve substantial spoken communication. As part of a cutting-edge suite of real-time voice models in the API, it not only transcribes but also reasons and translates as conversations take place, advancing the capabilities of real-time audio interactions beyond basic exchanges to sophisticated voice interfaces that can actively listen, interpret, transcribe, and respond dynamically as discussions progress. This evolution in technology promises to transform how we interact with voice-driven systems, making them more intuitive and effective in handling live communication.

Description

Gradium offers a voice AI platform tailored for developers and businesses that are creating applications with speech capabilities and conversational interfaces. The platform's hosted APIs encompass a variety of functions, including streaming text-to-speech, speech-to-text, speech translation, and speech-to-speech, accessible via both WebSocket and REST interfaces, along with features like real-time turn detection, pronunciation adjustments, and voice design or cloning options. Users can explore the models and manage voices through a web-based studio, while comprehensive documentation and SDK guides aid in the development of applications. Potential applications span across voice agents, automation in customer service, live transcription services, multilingual voice interactions, and the generation of spoken content. Additionally, Gradium has introduced Phonon, an open-weight text-to-speech model that is intended for offline use in applications and on-device systems. The platform operates on a credit-based system for various services such as speech generation, transcription, and translation, ensuring flexibility and scalability for users. This comprehensive approach makes Gradium a versatile choice for those looking to enhance their applications with advanced voice capabilities.

API Access

Has API Yes 

API Access

Has API Yes 

Screenshots View All

Screenshots View All

No images available

Integrations

Eden AI No 
LiveKit No 
OpenAI Yes 
OpenAI Whisper Yes 
Pipecat No 
gpt-realtime Yes 

Integrations

Eden AI Yes 
LiveKit Yes 
OpenAI No 
OpenAI Whisper No 
Pipecat Yes 
gpt-realtime No 

Pricing Details

$0.017 per minute
Free Trial Yes 
Free Version No 

Pricing Details

$0/month
The free tier includes 45,000 credits. The XS plan is $13/month and includes 225,000 credits. Credits are shared across speech services; monthly plan credits do not roll over. Annual billing saves one 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 Yes 
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 No 
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 No 

Vendor Details

Company Name

OpenAI

Founded

2015

Country

United States

Website

openai.com/index/advancing-voice-intelligence-with-new-models-in-the-api/

Vendor Details

Company Name

Gradium

Founded

2025

Country

France

Website

gradium.ai/

Product Features

Product Features

Text to Speech

API No 
Adjust Speaking Rate / Pitch No 
Audio Optimization No 
Custom Lexicons No 
Different Voice Choices No 
Multi-Language Support No 
Synchronize Speech No 

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