diff --git a/labelme/widgets/canvas.py b/labelme/widgets/canvas.py
index 660d857f7..5c6cb78b8 100644
--- a/labelme/widgets/canvas.py
+++ b/labelme/widgets/canvas.py
@@ -1,3 +1,5 @@
+import contextlib
+
 import imgviz
 from loguru import logger
 from qtpy import QtCore
@@ -137,7 +139,18 @@ def initializeAiModel(self, name):
             logger.debug("AI model is already initialized: %r" % model.name)
         else:
             logger.debug("Initializing AI model: %r" % model.name)
-            self._ai_model = model()
+
+            class LoggerIO:
+                def write(self, message: str):
+                    if message := message.strip():
+                        logger.debug(message)
+
+                def flush(self):
+                    pass
+
+            # NOTE: gdown.download uses sys.stderr, so redirect it to logger.debug
+            with contextlib.redirect_stderr(new_target=LoggerIO()):
+                self._ai_model = model()
 
         if self.pixmap is None:
             logger.warning("Pixmap is not set yet")