diff --git a/src/Responses/Chat/CreateStreamedResponseChoice.php b/src/Responses/Chat/CreateStreamedResponseChoice.php
index 6e4f7886..33b07350 100644
--- a/src/Responses/Chat/CreateStreamedResponseChoice.php
+++ b/src/Responses/Chat/CreateStreamedResponseChoice.php
@@ -20,7 +20,7 @@ public static function from(array $attributes): self
     {
         return new self(
             $attributes['index'],
-            CreateStreamedResponseDelta::from($attributes['delta']),
+            CreateStreamedResponseDelta::from($attributes['delta'] ?? []),
             $attributes['finish_reason'] ?? null,
         );
     }