{"kind":"compare","slug":"voxcpm","path":"/compare/voxcpm","title":"VoxCPM 2 Alternative for Fast CPU Speech | SuperClonica","description":"VoxCPM 2 vs SuperClonica: 48 kHz audio, voice design and 30 languages against a small Supertonic 3 engine that is faster on CPU. Our estimates, when to use it.","h1":"VoxCPM 2 vs SuperClonica: studio sound or CPU speed","intro":"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.\n\nBelow is a side-by-side look based on the VoxCPM documentation and our own comparison table.","sections":[{"heading":"What VoxCPM 2 can do","paragraphs":["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."],"points":["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."]},{"heading":"VoxCPM 2 on CPU and GPU","paragraphs":["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."]},{"heading":"Quality and stability","paragraphs":["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."]},{"heading":"When VoxCPM 2 is the better choice","paragraphs":["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:"],"points":["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."]}],"faq":[{"question":"Can VoxCPM run on CPU?","answer":"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."},{"question":"How much VRAM does VoxCPM 2 need?","answer":"About 8 GB, according to the comparison table in the VoxCPM repository."},{"question":"Is VoxCPM free for commercial use?","answer":"Yes. The weights and code are released under Apache 2.0, and the authors describe them as free for commercial use."},{"question":"Which is faster for long narration without a GPU?","answer":"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."}],"cta":{"catalog":"Open the voice catalog","install":"SuperClonica installation guide"},"sources":[{"label":"VoxCPM repository (GitHub)","url":"https://github.com/OpenBMB/VoxCPM"},{"label":"VoxCPM2 model card (Hugging Face)","url":"https://huggingface.co/openbmb/VoxCPM2"},{"label":"ONNX export with CPU figures","url":"https://github.com/DakeQQ/Text-to-Speech-TTS-ONNX#performance"},{"label":"Supertonic 3 model card","url":"https://huggingface.co/supertone-oss-archive/supertonic-3"}],"published":"2026-10-17","updated":"2026-10-23","pages":[{"slug":"text-to-speech","path":"/text-to-speech","h1":"Text-to-speech that runs on your own computer"},{"slug":"supertonic","path":"/compare/supertonic","h1":"Supertonic vs SuperClonica: same model, faster and cleaner"},{"slug":"fish-audio","path":"/compare/fish-audio","h1":"Fish Audio and Fish Speech vs SuperClonica"},{"slug":"omnivoice","path":"/compare/omnivoice","h1":"OmniVoice vs SuperClonica: more languages or more speed"},{"slug":"qwen3-tts","path":"/compare/qwen3-tts","h1":"Qwen3-TTS vs SuperClonica for local text-to-speech"},{"slug":"voxcpm","path":"/compare/voxcpm","h1":"VoxCPM 2 vs SuperClonica: studio sound or CPU speed"},{"slug":"f5-tts","path":"/compare/f5-tts","h1":"F5-TTS vs SuperClonica: zero-shot cloning or fast CPU speech"},{"slug":"elevenlabs","path":"/compare/elevenlabs","h1":"An offline alternative to ElevenLabs"},{"slug":"kokoro","path":"/compare/kokoro","h1":"Kokoro TTS vs SuperClonica: two small models for local speech"},{"slug":"piper","path":"/compare/piper","h1":"Piper TTS vs SuperClonica: tiny devices or custom voices"},{"slug":"xtts","path":"/compare/xtts","h1":"Coqui XTTS-v2 vs SuperClonica: a Coqui TTS alternative"},{"slug":"chatterbox","path":"/compare/chatterbox","h1":"Chatterbox TTS vs SuperClonica: instant cloning or a trained voice file"}],"related":[{"slug":"offline-text-to-speech","path":"/guides/offline-text-to-speech","h1":"How to convert text to speech offline on your computer"},{"slug":"voice-cloning","path":"/guides/voice-cloning","h1":"Voice cloning: how to get a voice that sounds like a recording"},{"slug":"best-free-tts-models","path":"/guides/best-free-tts-models","h1":"The best free text-to-speech models for local use in 2026"},{"slug":"text-to-speech-for-videos","path":"/guides/text-to-speech-for-videos","h1":"Text to speech for videos, audiobooks, games and apps"},{"slug":"supertonic-3-voices","path":"/guides/supertonic-3-voices","h1":"Supertonic 3 voices: where to get custom voices and how to use them"},{"slug":"python-text-to-speech","path":"/guides/python-text-to-speech","h1":"Text to speech in Python: offline, free and with natural voices"},{"slug":"text-to-speech-api-docker","path":"/guides/text-to-speech-api-docker","h1":"Self-hosted text-to-speech API in Docker"}]}