VUI Labs Luna-TTS (and Luna-TTS Realtime)
Price$15 per 1M characters
Checked29 September 2026
Where it stands
50newer speech and audio models since its release
- NVIDIA Nemotron 3.5 Transcribe (30B-A4B)28 Oct 2026
- Hy-SimulMT-30B-A3B22 Oct 2026
- Eleven Realtime v1 Max / Mini20 Oct 2026
- Voxtral Mini Transcribe 3 (+ Mini Transcribe Realtime 3)20 Oct 2026
- Voxtral Small Transcribe 320 Oct 2026
The 5 newest are listed. All speech and audio models
- Weights
- Closed weights.
How to call it
2 ways to use VUI Labs Luna-TTS (and Luna-TTS Realtime).
| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| VUI Labs API | vuilabs.ai | ||
| arXiv (technical report) | arxiv.org |
Pricing
| Per 1M characters | $15 |
|---|
As published: “USD per 1M characters (Luna-TTS and Luna-TTS Character); voice cloning $3 per clone”.
Source: vuilabs.ai, checked 29 September 2026.
Specs
- Input
- Text and audio
- Output
- Audio
- Context window
- Not published
- Max output
- Not published
- Open weights
- No
- Licence
- Proprietary
- Released
- June 2026
- Status
- Current
- Type
- Speech and audio
What stands out
What its maker marketed at launch, and what people found later, each with its source.
Diffusion-language-model TTS (non-autoregressive)
Generates the whole RVQ token grid in a fixed number of parallel refinement steps; the Realtime variant is blockwise-autoregressive over 1.28 s blocks (RTF 0.0240, 41.6 ms first-block latency locally). 0.6B backbone, ~1M hours of zh/en/ja/ko speech.
Chinese startup at the top of TTS arenas
Found after launch
Pandaily (Aug 2026) reported #1 on Hugging Face TTS Arena and #3 on Artificial Analysis Speech Arena; on 2026-09-29 AA shows it #8 (Elo 1230).
Notes
Chinese voice-AI startup (Pandaily). Release month June 2026 per the Artificial Analysis leaderboard; technical report 2026-08-12 (Feng Yin et al., 22 authors). Supports zero-shot cloning, speech editing, emotion control, non-verbal vocalisations. We found no statement about open weights. Not the same as fluxions-ai ‘Vui’ (open Apache-2.0 small TTS).
Sources: https://arxiv.org/abs/2608.11593 , https://www.vuilabs.ai/ , https://artificialanalysis.ai/text-to-speech/model-families/luna-tts
Not yet checked against an official source: Pandaily headline calls it China’s ‘Thinking Machines’ and names Qian Yanmin (role not verified).