diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index 071d0ed51..b3f3ad1bf 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -181,7 +181,7 @@ class Coder:
         if self.repo:
             rel_repo_dir = self.repo.get_rel_repo_dir()
             num_files = len(self.repo.get_tracked_files())
-            self.io.tool_output(f"Git repo: {rel_repo_dir} with {num_files} files")
+            self.io.tool_output(f"Git repo: {rel_repo_dir} with {num_files:,} files")
         else:
             self.io.tool_output("Git repo: none")
             self.find_common_root()