---
base_model: mistralai/Voxtral-Mini-4B-Realtime-2602
library_name: mlx
license: apache-2.0
pipeline_tag: automatic-speech-recognition
tags:
  - voxtral
  - audio
  - speech
  - speech-recognition
  - realtime
  - streaming
  - asr
  - mlx
  - rotorquant
  - quantization
  - 2-bit
---

# Voxtral-Mini-4B-Realtime-2602-RotorQuant-MLX-2bit

2-bit MLX weight-quantized build of [`mistralai/Voxtral-Mini-4B-Realtime-2602`](https://huggingface.co/mistralai/Voxtral-Mini-4B-Realtime-2602) with RotorQuant KV-cache. Ultra-compact real-time ASR for memory-constrained Apple Silicon — best-available 2-bit stability on streaming audio.

## Overview

- **Base:** `mistralai/Voxtral-Mini-4B-Realtime-2602` — 4B real-time ASR model
- **Weight precision:** 2-bit (group-wise)
- **KV-cache profile:** RotorQuant
- **Approx. on-disk size:** ~1.2 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-4B-Realtime-2602-RotorQuant-MLX-2bit")

for chunk in audio_stream():
    prompt = tokenizer.apply_chat_template(
        [{"role": "user", "content": [{"type": "audio", "path": chunk}]}],
        add_generation_prompt=True,
    )
    emit(generate(model, tokenizer, prompt=prompt, max_tokens=32))
```

## Model specs

| Field | Value |
|---|---|
| Parameters | 4B |
| Weight bits | 2 |
| Group size | 32 |
| Cache profile | RotorQuant |
| Size on disk | ~1.2 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 | Noisy/multi-speaker streams | Predictable domains, lowest p50 latency |

## See also

- [`majentik/Voxtral-Mini-4B-Realtime-2602-RotorQuant-MLX-4bit`](https://huggingface.co/majentik/Voxtral-Mini-4B-Realtime-2602-RotorQuant-MLX-4bit)
- [`majentik/Voxtral-Mini-4B-Realtime-2602-RotorQuant-MLX-8bit`](https://huggingface.co/majentik/Voxtral-Mini-4B-Realtime-2602-RotorQuant-MLX-8bit)
- [`majentik/Voxtral-Mini-4B-Realtime-2602-TurboQuant-MLX-2bit`](https://huggingface.co/majentik/Voxtral-Mini-4B-Realtime-2602-TurboQuant-MLX-2bit)
- [`majentik/Voxtral-Mini-4B-Realtime-2602-RotorQuant`](https://huggingface.co/majentik/Voxtral-Mini-4B-Realtime-2602-RotorQuant) — KV-cache-only bundle
- [`mistralai/Voxtral-Mini-4B-Realtime-2602`](https://huggingface.co/mistralai/Voxtral-Mini-4B-Realtime-2602) — upstream base model