Update README.md

README.md

@@ -13,16 +13,42 @@ tags:
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 # Melvin56/Qwen3-4B-ik_GGUF
 
-Quant for [ik_llama.cpp](https://github.com/ikawrakow/ik_llama.cpp)
+# Quant for [ik_llama.cpp](https://github.com/ikawrakow/ik_llama.cpp)
 
-Original Model : [Qwen/Qwen3-4B](https://huggingface.co/Qwen/Qwen3-4B)
+Build: 3680 (a2d24c97)
 
-Llama.cpp build: 36e6e888 (3681)
+Original Model : [Qwen/Qwen3-4B](https://huggingface.co/Qwen/Qwen3-4B)
 
 I used imatrix to create all these quants using this [Dataset](https://gist.github.com/tristandruyen/9e207a95c7d75ddf37525d353e00659c/#file-calibration_data_v5_rc-txt).
 
 <img src="Qwen3-4B.png" alt="Perplexity" width="600">
 
+<details>
+<summary>Perplexity measurement methodology.</summary>
+
+I tested all quants using ik_llama.cpp build 3680 (a2d24c97)
+```
+ik_llama.cpp/build/bin/llama-perplexity \
+-m .gguf \
+--ctx-size 512 \
+--ubatch-size 512 \
+-f wikitext-2-raw/wiki.test.raw \
+-fa \
+-ngl 999
+```
+
+# Raw data
+
+| Quant   | Size (GB) | PPL                 |
+|---------|-----------|---------------------|
+| BF16    | 8.05      | 14.3308 +/- 0.13259 |
+| IQ6_K   | 3.34      | 14.2810 +/- 0.13159 |
+| IQ5_K   | 2.82      | 14.5004 +/- 0.13465 |
+| IQ4_K   | 2.38      | 14.5280 +/- 0.13414 |
+| IQ4_KS  | 2.22      | 15.2121 +/- 0.14294 |
+
+</details>
+
 ---
 
 |               | CPU (AVX2) | CPU (ARM NEON) | Metal | cuBLAS | rocBLAS | SYCL | CLBlast | Vulkan | Kompute |