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/nemotron-voicechat/

# NVIDIA NemotronLabs VoiceChat 11B (and PersonaPlex-7B)

NVIDIA, Nemotron Speech family. Status: current. Type: speech and audio. Released: 2026-08-03.

## How to call it

| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| Hugging Face | `nvidia/NVIDIA-NemotronLabs-VoiceChat-11B` |  | https://huggingface.co/nvidia/NVIDIA-NemotronLabs-VoiceChat-11B |
| Hugging Face | `nvidia/personaplex-7b-v1` |  | https://huggingface.co/nvidia/personaplex-7b-v1 |
| arXiv |  |  | https://arxiv.org/abs/2609.21967 |

## Pricing

- Price not published.
- Last checked: 2026-09-29

## Specs

- Input: audio
- Output: audio, text
- Context window: not published
- Max output: not published
- Open weights: yes
- Licence: OpenMDW-1.1

## Where it stands

- Newer speech and audio models in the registry since its release: 38. 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/
- Before it from NVIDIA: NVIDIA MagpieTTS Multilingual 357M (2025-12-11) https://postcutoff.com/m/nvidia-magpie-tts-multilingual/
- After it from NVIDIA: NVIDIA Nemotron 3.5 Transcribe (30B-A4B) (2026-10-28) https://postcutoff.com/m/nemotron-3-5-transcribe/
- Weights are public. Licence: OpenMDW-1.1. See the licence for commercial terms.

## What stands out

- Open full-duplex speech model with tool calling (first): End-to-end (FastConformer encoder + Nemotron Nano v2 9B + TTS decoder, 11B total) full-duplex voice chat that calls tools mid-conversation; NVIDIA calls it the first open full-duplex model to support tool calling. BFCL-v3 (AU Harness) 56.1%, Full-Duplex-Bench v3 tool selection 82.5%. Source: https://huggingface.co/nvidia/NVIDIA-NemotronLabs-VoiceChat-11B
- Natural turn-taking: ~450 ms turn-taking latency; #2 among open models on VoiceBench and Full-Duplex-Bench 1.0 (smooth turn-taking 0.82, interruption latency 480 ms). Source: https://huggingface.co/nvidia/NVIDIA-NemotronLabs-VoiceChat-11B
- PersonaPlex: persona + voice prompted full duplex (found after launch): PersonaPlex-7B-v1 (2026-01-15), fine-tuned from Kyutai Moshiko, takes a voice prompt and a text persona/role prompt. Source: https://huggingface.co/nvidia/personaplex-7b-v1

## Notes

English only. Requires datacenter GPU (A100/H100/H200/B100/B200 or RTX 6000). 'First' is NVIDIA's claim on the model card. HF card release date 2026-08-03; arXiv paper 2609.21967 (Sept 2026).

Sources: https://huggingface.co/nvidia/NVIDIA-NemotronLabs-VoiceChat-11B , https://huggingface.co/nvidia/personaplex-7b-v1

Model page: https://postcutoff.com/m/nemotron-voicechat/