diff --git a/BACKEND/app/services/line_connection.ts b/BACKEND/app/services/line_connection.ts
index b760a03..33258ab 100644
--- a/BACKEND/app/services/line_connection.ts
+++ b/BACKEND/app/services/line_connection.ts
@@ -919,7 +919,7 @@ export default class LineConnection {
       }
 
       const payload = {
-        model: 'gpt-5-mini',
+        model: 'gpt-5.4',
         messages: [
           {
             role: 'user',
@@ -1187,7 +1187,7 @@ ${this.config.reasonSkipPhysical ? `***User skip test ports:\n- ${this.config.re
     const data = `-------[ATC]-[${dataFormat}]-------
 *****[DPELP]*****
 License: ${licenses.join(', ')}
-Issues:
+Detected by AI:
 ${note}
 *****[Physical]*****
 Total Ports: ${portPhysical?.length}