Update README.md

README.md

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 ---
 license: mit
+language:
+- en
+library_name: transformers
+pipeline_tag: text-generation
+tags:
+- rlhf
+- stable diffusion
 ---
+
+# GPT2-Large For Writing Stable Diffusion Prompts
+
+This is a GPT2-Large model fine-tuned for rewriting prompts for Stable Diffusion v1.5 through RLHF. The model takes an image description and writes a prompt resulting in aestheticcally pleasing images.
+
+## How To Use a Model
+
+Write an image description and add a special SEP token: `</s>`, the model writes the prompt after it. Example:
+
+```
+a cat</s>
+```