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What is Phonon?

Phonon is an open-weight text-to-speech (TTS) model and inference runtime that caters to developers who wish to integrate speech generation into applications with local and offline audio functionalities. This cutting-edge system converts written text into spoken words and can stream speech in real-time as it is generated. It provides interfaces for programming languages such as Rust and Python, includes a Swift package for iOS and macOS, offers JavaScript support for web browsers, and has libraries available for Android; it can also operate as a self-hosted server compatible with OpenAI's API. The model is designed to support various languages, including English, French, German, Spanish, and Portuguese, depending on the specific variant employed. Phonon is ideal for developers looking to embed speech capabilities into mobile, desktop, web, embedded, and server applications, particularly in situations that prioritize offline use or require enhanced privacy. The English model is comprised of 31 million parameters and is licensed under Apache 2.0, while the language-specific and multilingual models, with 40 million parameters, are available under CC BY-NC 4.0. Furthermore, the runtime's source code is offered under either the Apache 2.0 or MIT licenses, ensuring it is accessible for diverse development requirements. This adaptability and extensive support position Phonon as a highly versatile option for speech synthesis across a variety of platforms, making it a valuable asset for developers in the field.

What is NexaSDK?

The Nexa SDK is an all-encompassing toolkit for developers, empowering them to execute and deploy various AI models locally on a broad spectrum of devices that have NPUs, GPUs, and CPUs, enabling efficient functioning without dependence on cloud services. It boasts a swift command-line interface, Python bindings, and mobile SDKs tailored for both Android and iOS platforms, and it is also compatible with Linux, allowing developers to easily integrate AI features into applications, IoT devices, automotive technologies, and desktop environments with minimal configuration, requiring just a single line of code to run models. Furthermore, it offers an OpenAI-compatible REST API and function calling capabilities, streamlining the integration with pre-existing client systems. The innovative NexaML inference engine, meticulously engineered for peak performance across diverse hardware setups, supports a variety of model formats, including GGUF, MLX, and its proprietary format. Additionally, the SDK encompasses comprehensive multimodal support, addressing a wide array of tasks related to text, images, and audio, which includes features like embeddings, reranking, speech recognition, and text-to-speech. Importantly, the SDK prioritizes Day-0 support for the latest architectural innovations, ensuring that developers remain at the cutting edge of AI advancements. This extensive array of features not only enhances the functionality of the Nexa SDK but also establishes it as a vital resource for developers aiming to create state-of-the-art AI applications. With each update, Nexa SDK continues to evolve, adapting to the changing landscape of technology and user needs.

Media

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Media

Integrations Supported

Hugging Face

Integrations Supported

Android
Apple iOS
Arch Linux
DeepSeek
Ministral 3
Ministral 3B
Python
Qwen3-Coder
smol developer

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided
Free Version

Pricing Information

Pricing not provided

Supported Platforms

Android
iPhone
iPad
Windows
Mac
On-Prem
Linux

Supported Platforms

Android
iPhone
iPad
Windows
Mac
Linux

Customer Service / Support

Not specified

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub

Company Facts

Organization Name

Gradium

Date Founded

2025

Company Location

France, United States

Company Website

gradium.ai/phonon

Company Facts

Organization Name

NexaSDK

Date Founded

2023

Company Location

United States

Company Website

sdk.nexa.ai/

Categories and Features

Categories and Features

AI Development

Not specified

AI SDKs

Not specified

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