update readme

README.md

@@ -36,6 +36,16 @@ This repository provides a Japanese GPT-NeoX model of 3.6 billion parameters.
 
     A final validation perplexity of **8.68** has been reached.
 
+
+* **Model Series**
+
+    | Variant | Link |
+    | :-- | :--|
+    | 3.6B PPO | https://huggingface.co/rinna/japanese-gpt-neox-3.6b-instruction-ppo |
+    | 3.6B SFT-v2 | https://huggingface.co/rinna/japanese-gpt-neox-3.6b-instruction-sft-v2 |
+    | 3.6B SFT | https://huggingface.co/rinna/japanese-gpt-neox-3.6b-instruction-sft |
+    | 3.6B pretrained | https://huggingface.co/rinna/japanese-gpt-neox-3.6b |
+
 * **Authors**
     
     [Tianyu Zhao](https://huggingface.co/tianyuz) and [Kei Sawada](https://huggingface.co/keisawada)