Fixed bug where GPT3 object was not processing requests to GPT4

chatbot.py

@@ -958,7 +958,7 @@ def get_text_tokens(self, prompt: str, max_token_ct: int = 200) -> tuple:
         Send a request to gpt, get (response: str, token_count: int)
         '''
 
-        if not self.gpt_model == 'gpt-3.5-turbo':
+        if not self.gpt_model == 'gpt-3.5-turbo' and not self.gpt_model == 'gpt-4':
             response = openai.Completion.create(
                 model=self.gpt_model,
                 prompt=self.conversation,