As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/m/neutts/

# Neuphonic NeuTTS Air / NeuTTS Nano

Neuphonic, NeuTTS family. Status: current. Type: speech and audio. Released: 2025-10-02.

## How to call it

| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| GitHub |  |  | https://github.com/neuphonic/neutts |
| Hugging Face | `neuphonic/neutts-nano-german` |  | https://huggingface.co/neuphonic/neutts-nano-german |

## Pricing

- Price not published.
- Last checked: not recorded

## Specs

- Input: text, audio
- Output: audio
- Context window: not published
- Max output: not published
- Open weights: yes
- Licence: apache-2.0 (NeuTTS Air)

## Where it stands

- Newer speech and audio models in the registry since its release: 82. The 5 newest:
  - NVIDIA Nemotron 3.5 Transcribe (30B-A4B) (2026-10-28) https://postcutoff.com/m/nemotron-3-5-transcribe/
  - Hy-SimulMT-30B-A3B (2026-10-22) https://postcutoff.com/m/hy-simulmt-30b-a3b/
  - Eleven Realtime v1 Max / Mini (2026-10-20) https://postcutoff.com/m/eleven-realtime-v1-max/
  - Voxtral Mini Transcribe 3 (+ Mini Transcribe Realtime 3) (2026-10-20) https://postcutoff.com/m/voxtral-mini-transcribe-3/
  - Voxtral Small Transcribe 3 (2026-10-20) https://postcutoff.com/m/voxtral-small-transcribe-3/
- Weights are public. Licence: Apache-2.0. See the licence for commercial terms.

## What stands out

- On-device TTS with instant cloning: NeuTTS Air: 748M params (0.5B-class Qwen backbone + NeuCodec), real time from RTX 4090 down to Raspberry Pi, clones from ~3 s of audio, Perth watermark on every output; Nano: 229M total / 120M active for tighter edge devices. Source: https://www.marktechpost.com/2025/10/02/neuphonic-open-sources-neutts-air-a-748m-parameter-on-device-speech-language-model-with-instant-voice-cloning/

## Notes

Release date from MarkTechPost coverage (2025-10-02). Nano license and exact Air HF repo id (neuphonic/neutts-air) not verified today.

Sources: https://github.com/neuphonic/neutts

Model page: https://postcutoff.com/m/neutts/