diff --git a/src/exchange/moderators/truncate.py b/src/exchange/moderators/truncate.py
index 3185206..f156b23 100644
--- a/src/exchange/moderators/truncate.py
+++ b/src/exchange/moderators/truncate.py
@@ -20,7 +20,7 @@
 class ContextTruncate(Moderator):
     def __init__(
         self,
-        model: str = "gpt-4o-mini",
+        model: str = None,
         max_tokens: int = MAX_TOKENS,
     ) -> None:
         self.model = model