Update backend.py

backend.py

@@ -86,7 +86,7 @@ def generate_testcases(user_story):
     try:
         # Call the Nvidia llama API with the refined prompt
         completion = client.chat.completions.create(
-            model="meta/llama-3.1-70b-instruct",  # Using llama3.1 70b model
+            model="meta/llama-3.1-405b-instruct",  # Using llama3.1 405b model
             messages=[
                 {"role": "user", "content": prompt}
             ],