diff --git a/README.md b/README.md
index 8219069..3eeda7e 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,16 @@ A minimalistic Python API for OpenAI's ChatGPT and Bing's Chatbot
 
 You need an API key for the official ChatGPT API.
 
-### Unofficial API for Bing Chatbot
+The following models are supported:
+
+    - GPT-4
+    - GPT-4-0314
+    - GPT-4-32k
+    - GPT-4-32k-0314
+    - GPT-3.5-Turbo
+    - GPT-3.5-Turbo-0301
+
+### Unofficial Bing Chatbot API
 
 This requires your Cookies to be exported to a json file. See [EdgeGPT's README](https://github.com/acheong08/EdgeGPT#readme) for more infos.
 
diff --git a/chatgpt_pyapi/openai.py b/chatgpt_pyapi/openai.py
index 6bf999c..a1d80e9 100644
--- a/chatgpt_pyapi/openai.py
+++ b/chatgpt_pyapi/openai.py
@@ -6,6 +6,10 @@ from urllib import request as http_request
 
 class Models:
     '''This class holds available models'''
+    GPT_4 = "gpt-4"
+    GPT_4_0314 = "gpt-4-0314"
+    GPT_4_32K = "gpt-4-32k"
+    GPT_4_32K_0314 = "gpt-4-32k-0314"
     GPT_35_TURBO = "gpt-3.5-turbo"
     GPT_35_TURBO_0301 = "gpt-3.5-turbo-0301"