Update app.py

app.py

@@ -37,7 +37,7 @@ def parse_conversation(messages):
 
 def respond(message, history, model, approach, system_message, max_tokens, temperature, top_p):
     try:
-        client = OpenAI(api_key=API_KEY, base_url="https://openrouter.ai/api/v1")
+        client = OpenAI(api_key=API_KEY, base_url="https://openrouter.ai/v1")
         messages = [{"role": "system", "content": system_message}]
         
         for val in history: