Revert back to qwen.

app.py

@@ -50,10 +50,10 @@ def handle_submit():
             ]
 
         completion = client.chat.completions.create(
-            #model="Qwen/Qwen2.5-72B-Instruct",
+            model="Qwen/Qwen2.5-72B-Instruct",
             #model="Qwen/Qwen2.5-Coder-32B-Instruct",
             #model="mistralai/Mistral-7B-Instruct-v0.3",
-            model="meta-llama/Llama-3.1-8B-Instruct",
+            #model="meta-llama/Llama-3.1-8B-Instruct",
             messages=messages,
             max_tokens=1000
         )