# VoxCPM 2 vs SuperClonica: studio sound or CPU speed

Updated 2026-10-23

VoxCPM 2 from OpenBMB is a 2B-parameter text-to-speech model released in April 2026. It outputs 48 kHz audio, speaks 30 languages, clones voices and can create a new one from a text description, all under Apache 2.0. SuperClonica runs Supertonic 3 voices; that model is about twenty times smaller, so it is much faster on a CPU but less flexible.

Below is a side-by-side look based on the VoxCPM documentation and our own comparison table.

## What VoxCPM 2 can do

VoxCPM is tokenizer-free: it generates speech in the latent space of an audio VAE through a diffusion autoregressive pipeline built on a MiniCPM-4 backbone.

- 30 languages without a language tag, plus nine Chinese dialects such as Cantonese and Sichuanese.
- 48 kHz output from a 16 kHz reference, with built-in super-resolution.
- Voice design from a natural-language description, and controllable cloning.
- Detailed cloning from a reference clip together with its transcript.
- Weights and code under Apache 2.0, described by the authors as free for commercial use.

## VoxCPM 2 on CPU and GPU

On an RTX 4090 the authors report a real-time factor of about 0.3, or about 0.13 with Nano-vLLM; the model needs around 8 GB of VRAM. On an Apple M4 Pro through llama.cpp-omni with Q8_0 weights they report about 1.76.

For a desktop 8-core CPU we estimate 2–4× slower than real time, so a 10-second phrase takes 20–40 seconds. The estimate starts from an ONNX export that reports 3.8 with INT8 weights on a Core i3-12300 and assumes a faster CPU gives up to twice the speed. SuperClonica runs 6.4–9.7× faster than real time, about 1.0–1.6 seconds for the same phrase.

## Quality and stability

Our table gives VoxCPM 2 and SuperClonica the same quality mark, 4.5 out of 5. For timbre stability VoxCPM 2 gets 3.5 and SuperClonica 5.

The VoxCPM authors note that voice design and controllable cloning results can vary between runs and suggest generating one to three times. For a single trailer that is fine. For a game where one character speaks thousands of lines, a fixed voice file is easier to keep consistent.

## When VoxCPM 2 is the better choice

Choose SuperClonica when speech runs on CPUs, offline and in volume, in one of the 31 Supertonic 3 languages. VoxCPM 2 is the better pick in these cases:

- You need Chinese or one of its dialects.
- You want 48 kHz output for ads, music or video.
- You want to design a voice from a description or clone one instantly.
- You have a GPU with around 8 GB of memory or more.

## More on text to speech

- [Text-to-speech that runs on your own computer](https://superclonica.com/en/text-to-speech)
- [Supertonic vs SuperClonica: same model, faster and cleaner](https://superclonica.com/en/compare/supertonic)
- [Fish Audio and Fish Speech vs SuperClonica](https://superclonica.com/en/compare/fish-audio)
- [OmniVoice vs SuperClonica: more languages or more speed](https://superclonica.com/en/compare/omnivoice)
- [Qwen3-TTS vs SuperClonica for local text-to-speech](https://superclonica.com/en/compare/qwen3-tts)
- [F5-TTS vs SuperClonica: zero-shot cloning or fast CPU speech](https://superclonica.com/en/compare/f5-tts)
- [An offline alternative to ElevenLabs](https://superclonica.com/en/compare/elevenlabs)
- [Kokoro TTS vs SuperClonica: two small models for local speech](https://superclonica.com/en/compare/kokoro)
- [Piper TTS vs SuperClonica: tiny devices or custom voices](https://superclonica.com/en/compare/piper)
- [Coqui XTTS-v2 vs SuperClonica: a Coqui TTS alternative](https://superclonica.com/en/compare/xtts)
- [Chatterbox TTS vs SuperClonica: instant cloning or a trained voice file](https://superclonica.com/en/compare/chatterbox)

## Text-to-speech guides

- [How to convert text to speech offline on your computer](https://superclonica.com/en/guides/offline-text-to-speech)
- [Voice cloning: how to get a voice that sounds like a recording](https://superclonica.com/en/guides/voice-cloning)
- [The best free text-to-speech models for local use in 2026](https://superclonica.com/en/guides/best-free-tts-models)
- [Text to speech for videos, audiobooks, games and apps](https://superclonica.com/en/guides/text-to-speech-for-videos)
- [Supertonic 3 voices: where to get custom voices and how to use them](https://superclonica.com/en/guides/supertonic-3-voices)
- [Text to speech in Python: offline, free and with natural voices](https://superclonica.com/en/guides/python-text-to-speech)
- [Self-hosted text-to-speech API in Docker](https://superclonica.com/en/guides/text-to-speech-api-docker)

## Frequently asked questions

### Can VoxCPM run on CPU?

Yes, through ports such as an ONNX export, which reports a real-time factor of 3.8 with INT8 weights on a Core i3-12300. We estimate 2–4× slower than real time on a desktop 8-core CPU. The official requirements list CUDA 12.0 or newer.

### How much VRAM does VoxCPM 2 need?

About 8 GB, according to the comparison table in the VoxCPM repository.

### Is VoxCPM free for commercial use?

Yes. The weights and code are released under Apache 2.0, and the authors describe them as free for commercial use.

### Which is faster for long narration without a GPU?

SuperClonica. By our estimates for a desktop 8-core CPU, an hour of audio takes about 7–11 minutes with SuperClonica and 2–4 hours with VoxCPM 2.

- [Open the voice catalog](https://superclonica.com/en/explore)
- [SuperClonica installation guide](https://superclonica.com/en/superclonica)

## Sources

- [VoxCPM repository (GitHub)](https://github.com/OpenBMB/VoxCPM)
- [VoxCPM2 model card (Hugging Face)](https://huggingface.co/openbmb/VoxCPM2)
- [ONNX export with CPU figures](https://github.com/DakeQQ/Text-to-Speech-TTS-ONNX#performance)
- [Supertonic 3 model card](https://huggingface.co/supertone-oss-archive/supertonic-3)
- [SuperClonica](https://superclonica.com/en/)
- [AI voice catalog for text to speech](https://superclonica.com/en/explore)
- [Custom voice commissions for Supertonic 3](https://superclonica.com/en/requests)
- [How it works: voices, local speech, training](https://superclonica.com/en/guide)
- [Install the faster Supertonic 3 engine](https://superclonica.com/en/superclonica)
- [About us: speech synthesis enthusiasts](https://superclonica.com/en/about)
- [Contacts, support and voice complaints](https://superclonica.com/en/contacts)
- [Privacy policy: what data we keep](https://superclonica.com/en/privacy)
- [Terms of use: rules for buyers and authors](https://superclonica.com/en/terms)
- [Text to speech](https://superclonica.com/en/text-to-speech)