Supertonic 2

Most TTS systems make you choose between speed, quality, and privacy. Supertonic 2 refuses that tradeoff — a featherweight 66M parameter model that runs 167× faster than real-time, entirely on your device, with zero network dependency. Powered by ONNX Runtime, it deploys across 11 platforms from iOS to Rust to the browser, supports 5 languages, and correctly reads complex real-world expressions that trip up every major cloud TTS API.