# Gradium — Gradium Phonon: On-Device TTS for Consumer Apps, NPCs, and Offline Products

- Company: Gradium (gradium.ai)
- Announced: 2026-04-03
- Category: not stated
- Coverage: not counted
- Announcement: yes
- Group: announcements
- Source: https://gradium.ai/blog/gradium-phonon
- Record: https://forck.live/items/18324-gradium-phonon-on-device-tts-for-consumer-apps-npcs-and-offline-products
- Subject: Gradium TTS / Phonon

Listen to samples generated by the base Phonon model The Gradium API is built for AI voice agents. Customer support agents, conversational B2B assistants, outbound sales agents: use cases where the voice layer needs to handle any language, any speaker, complex dialogue, and the specific compliance or integration requirements each enterprise context brings. Inference runs on GPU compute, which is what makes the quality and flexibility possible. It also means the cost model is variable: every generation is a billable request. For most products, that's the right trade. For some, it isn't. Gradium Phonon is an on-device text-to-speech model that runs entirely on CPU across Android and iOS, with no network connection required. It works with any voice: custom, cloned, or synthetic. Where the Gradium API is serving any voice and language from the cloud, Phonon takes the opposite approach. We take any voice you bring us (or one from our catalogue), finetune a single-purpose model around it for your specific language and use case, and ship it as a licensed binary inside your app. …

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