See gpt-oss-20b 6.5bit MLX in action - demonstration video
q6.5bit quant typically achieves 1.128 perplexity in our testing which is equivalent to q8.
| Quantization | Perplexity |
|---|---|
| q2 | 41.293 |
| q3 | 1.900 |
| q4 | 1.168 |
| q6 | 1.128 |
| q8 | 1.128 |
Usage Notes
- Tested to run with Inferencer app
- Memory usage: ~17 GB (down from ~46GB required by native MXFP4 format)
- Expect ~100 tokens/s
- Quantized with a modified version of MLX 0.26
- For more details see demonstration video or visit OpenAI gpt-oss-20b.
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