Update README.md

README.md

@@ -23,6 +23,17 @@ This model was quantized to 3-bit using DWQ with mlx-lm version **0.30.7**.
 | Relative KL reduction     | ≈40 %                          |
 | Tokens processed          | ≈1.11 M                        |
 
+## Perplexity
+
+Evaluated on 210 samples of 512 tokens from the default mlx-lm calibration data.
+
+| Model | Perplexity |
+|-------|-----------|
+| 3-bit | 7.802 |
+| 3-bit DWQ | **7.434** |
+| 4-bit | 6.581 |
+| 4-bit DWQ | 6.431 |
+
 ## Use with mlx
 
 ```bash