undu the model

app.py

@@ -21,7 +21,7 @@ class CSVChatBot:
         
         self.file_path = file.name
         try:
-            model = ChatOpenAI(temperature=0.5, model="meta-llama/llama-3-405b-instruct:free",base_url="https://openrouter.ai/api/v1",api_key=os.getenv("OPENAI_API_KEY"))
+            model = ChatOpenAI(temperature=0.5, model="mistralai/mistral-7b-instruct:free",base_url="https://openrouter.ai/api/v1",api_key=os.getenv("OPENAI_API_KEY"))
             self.agent = create_csv_agent(
                 llm=model,
                 path=self.file_path,