Supertone Releases Supertonic 3, a 99M-Parameter On-Device TTS Model That Runs Offline on a Raspberry Pi

Supertone Inc. has released Supertonic 3, a compact 99-million-parameter text-to-speech model that runs entirely offline on hardware as modest as a Raspberry Pi and, according to the developers, outperforms cloud services from ElevenLabs, OpenAI and Google Gemini on real-world text. The model is distributed as an open-weight ONNX file and requires no GPU or internet connection, positioning it as a direct challenge to the subscription-based cloud TTS market.