MODEL · SUPERTONE · LIGHTWEIGHT (ON-DEVICE)
Supertonic 3
A lightweight on-device TTS that runs entirely locally through ONNX Runtime — no cloud call for synthesis. Supertonic 3 expands the open-weight release from 5 to 31 languages, improves reading stability, and cuts repeat/skip failures. `pip install supertonic` and synthesize immediately with selectable voice styles.
License: OpenRAIL (responsible-use clauses) · Context: n/a · Released: May 6, 2026
The decision in five lines
- The call
- Skip for local
- Best for
- Local evaluation and family reference
- Runs on
- No planner hardware fits at default quant — see model card
- Watch out
- Voice cloning from a reference clip or top-tier expressive quality — Chatterbox, VoxCPM2, or MOSS-TTS-v1.5 are the picks there.
- Evidence
- Editorial
- Lightweight (on-device)
- PARAMETERS
- TTS
- TYPE
- —
- CONTEXT
- CPU / tiny — runs on-device via ONNX Runtime
- VRAM AT Q4
Where we recommend this
This model isn’t currently in an active planner slot. See the runner notes below if you’re running it anyway.
The call
A lightweight on-device TTS that runs entirely locally through ONNX Runtime — no cloud call for synthesis. Supertonic 3 expands the open-weight release from 5 to 31 languages, improves reading stability, and cuts repeat/skip failures. `pip install supertonic` and synthesize immediately with selectable voice styles.
When not to use: Voice cloning from a reference clip or top-tier expressive quality — Chatterbox, VoxCPM2, or MOSS-TTS-v1.5 are the picks there. Supertonic's edge is speed + on-device footprint + broad language coverage, not cloning fidelity.
Runner notes
Python SDK (`pip install supertonic`) on ONNX Runtime — CPU-friendly, no GPU required. OpenRAIL license carries responsible-use terms; check them for commercial deploys. 31 languages.
Next step
Find-by-model — see what hardware runs this→