Update app.py

app.py

@@ -23,7 +23,7 @@ from datetime import datetime, timedelta
 
 # Constants
 SUPPORTED_FILE_TYPES = [".csv", ".xlsx", ".xls"]
-DEFAULT_MODEL = "gpt-4"
+DEFAULT_MODEL = "gpt-4o-mini"
 HISTORY_FILE = "analysis_history.json"
 
 @dataclass
@@ -341,7 +341,7 @@ def create_interface():
         
         **Features:**
         - Interactive Plotly visualizations
-        - GPT-4 powered analysis
+        - gpt-4o-mini powered analysis
         - Time series analysis
         - Statistical insights
         - Natural language queries