---
base_model: mistralai/Voxtral-Mini-3B-2507
library_name: mlx
license: apache-2.0
pipeline_tag: automatic-speech-recognition
tags:
- voxtral
- audio
- speech
- speech-recognition
- transcription
- translation
- mlx
- rotorquant
- quantization
- 4-bit
language:
- en
---

# Voxtral-Mini-3B-2507-RotorQuant-MLX-4bit

4-bit MLX weight-quantized build of [`mistralai/Voxtral-Mini-3B-2507`](https://huggingface.co/mistralai/Voxtral-Mini-3B-2507) with a RotorQuant KV-cache profile. Recommended streaming-audio default on Apple Silicon.

## Overview

- **Base:** `mistralai/Voxtral-Mini-3B-2507` — 3B speech-understanding model
- **Capabilities:** transcription, speech translation, audio QA
- **Weight precision:** 4-bit (group-wise)
- **KV-cache profile:** RotorQuant (rotational online re-basis)
- **Approx. on-disk size:** ~1.5 GB
- **Runtime:** MLX on Apple Silicon

## Quickstart

```bash
pip install mlx-lm
```

```python
from mlx_lm import load, generate

model, tokenizer = load("majentik/Voxtral-Mini-3B-2507-RotorQuant-MLX-4bit")

prompt = tokenizer.apply_chat_template(
    [{"role": "user", "content": [{"type": "audio", "path": "meeting.wav"},
                                  {"type": "text", "text": "Transcribe."}]}],
    add_generation_prompt=True,
)
print(generate(model, tokenizer, prompt=prompt, max_tokens=512))
```

## Model specs

| Field | Value |
|---|---|
| Parameters | 3B |
| Weight bits | 4 |
| Group size | 64 |
| Cache profile | RotorQuant |
| Size on disk | ~1.5 GB |
| Target hardware | Apple Silicon (M1/M2/M3/M4) |
| License | Apache 2.0 |

## RotorQuant vs TurboQuant

| | RotorQuant | TurboQuant |
|---|---|---|
| Strategy | Rotational online re-basis | Per-head static calibration |
| Memory reduction | ~4x on KV-cache | ~3.5x on KV-cache |
| Best for | Streaming, code-switching | Batch transcription |

## See also

- [`majentik/Voxtral-Mini-3B-2507-RotorQuant-MLX-8bit`](https://huggingface.co/majentik/Voxtral-Mini-3B-2507-RotorQuant-MLX-8bit)
- [`majentik/Voxtral-Mini-3B-2507-RotorQuant-MLX-2bit`](https://huggingface.co/majentik/Voxtral-Mini-3B-2507-RotorQuant-MLX-2bit)
- [`majentik/Voxtral-Mini-3B-2507-TurboQuant-MLX-4bit`](https://huggingface.co/majentik/Voxtral-Mini-3B-2507-TurboQuant-MLX-4bit)
- [`majentik/Voxtral-Mini-3B-2507-RotorQuant`](https://huggingface.co/majentik/Voxtral-Mini-3B-2507-RotorQuant) — KV-cache-only bundle
- [`mistralai/Voxtral-Mini-3B-2507`](https://huggingface.co/mistralai/Voxtral-Mini-3B-2507) — upstream base model