historical note?

cc

@lysandre



@ybelkada



@osanseviero

wdyt?

README.md

@@ -3,7 +3,7 @@ language: en
 license: mit
 ---
 
-# OpenAI GPT
+# OpenAI GPT 1
 
 ## Table of Contents
 - [Model Details](#model-details)
@@ -19,7 +19,7 @@ license: mit
 
 ## Model Details
 
-**Model Description:** `openai-gpt` is a transformer-based language model created and released by OpenAI. The model is a causal (unidirectional) transformer pre-trained using language modeling on a large corpus with long range dependencies.
+**Model Description:** `openai-gpt` (a.k.a. "GPT-1") is the first transformer-based language model created and released by OpenAI. The model is a causal (unidirectional) transformer pre-trained using language modeling on a large corpus with long range dependencies.
 
 - **Developed by:** Alec Radford, Karthik Narasimhan, Tim Salimans, Ilya Sutskever. See [associated research paper](https://cdn.openai.com/research-covers/language-unsupervised/language_understanding_paper.pdf) and [GitHub repo](https://github.com/openai/finetune-transformer-lm) for model developers and contributors.
 - **Model Type:** Transformer-based language model