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license: mit
tags:
- mlx
- 4bit
- whisper
- stt
- metalrt
- apple-silicon
---
# Whisper Medium — MLX 4-bit Quantized
Custom MLX 4-bit quantization of [OpenAI Whisper Medium](https://huggingface.co/openai/whisper-medium) optimized for [MetalRT](https://github.com/RunanywhereAI/metalrt-binaries) GPU inference on Apple Silicon.
## Usage
Used by [RCLI](https://github.com/RunanywhereAI/RCLI) with the MetalRT engine for speech-to-text:
```bash
rcli setup # select MetalRT or Both engines
```
> **Note**: Whisper Medium is in GPU beta. Whisper Tiny is recommended for production use.
## Performance (Apple M3 Max)
| Metric | Value |
|--------|-------|
| Latency (1.2s audio) | 233 ms |
| RTF | 0.19x |
| Quantization | MLX 4-bit |
## License
Model weights: [MIT](https://github.com/openai/whisper/blob/main/LICENSE) (OpenAI)
MetalRT engine: [Proprietary](https://github.com/RunanywhereAI/metalrt-binaries/blob/main/LICENSE) (RunAnywhere, Inc.)
## Contact
founder@runanywhere.ai | https://runanywhere.ai
|