diff --git a/src/Providers/OpenAI/Support/StructuredModeResolver.php b/src/Providers/OpenAI/Support/StructuredModeResolver.php
index 70020cd1c..ea77ba961 100644
--- a/src/Providers/OpenAI/Support/StructuredModeResolver.php
+++ b/src/Providers/OpenAI/Support/StructuredModeResolver.php
@@ -42,6 +42,7 @@ protected static function supportsStructuredMode(string $model): bool
             'gpt-5-nano',
             'gpt-5.1',
             'gpt-5.2',
+            'gpt-5.4',
         ]);
     }