Change GPT model

GPTHelper.py

@@ -14,7 +14,7 @@ def gpt_rephrase(fact):
                     PUBMED QUERY:"
     try:
         response = openai.Completion.create(
-          model="text-ada-001",
+          model="text-davinci-003",
           prompt=prompt,
           max_tokens=250,
           temperature=0
@@ -44,9 +44,9 @@ def check_fact(evidence, fact):
                 ANSWER:"
     try:
         response = openai.Completion.create(
-          model="text-ada-001",
+          model="text-davinci-003",
           prompt=prompt,
-          max_tokens=2,
+          max_tokens=2,  # Don't need more for true/false/undetermined
           temperature=0
         )
         response = response['choices'][0]['text'].strip()