Gradium TTS Beta

Gradium TTS Beta is a cloud-based text-to-speech model released by Gradium in July 2026. It is specifically engineered to handle complex linguistic edge cases natively, such as phone numbers, email addresses, and specialized numeric formats, without requiring developers to perform manual text normalization or pre-processing. The model is designed for high-stakes production environments where accurate pronunciation of technical or formatted data is critical for voice agent performance.

The model's primary capability lies in its ability to parse and vocalize difficult text segments with native-level prosody. This includes character-accurate reading of email addresses, international phone number formats, IBAN numbers read with correct grouping, and complex time expressions (e.g., "halb drei" in German). By managing these cases at the model level, it eliminates the need for extensive prompt engineering or external normalization rules typically required by standard TTS engines.

Built on a GPU-backed cloud infrastructure, Gradium TTS Beta utilizes a streaming architecture optimized for low-latency interactions. It is often deployed as part of a real-time voice pipeline for conversational AI agents. The model supports multilingual synthesis in languages including English, French, German, and Portuguese (BR), and it is compatible with Gradium's instant voice cloning technology, which can replicate a target voice from a short audio sample.

For developers using the API, the model is identified by the name gradium-tts-beta. It is accessible through WebSocket endpoints to support continuous audio streaming for real-time applications. Gradium maintains a developer-first focus by allowing raw text from large language models or databases to be passed directly to the synthesis engine, ensuring that the output remains fluent even when encountering URLs, measurements, or reference codes.