diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index 83fa0371d..f7c201fe8 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -56,7 +56,6 @@ class Coder:
     last_asked_for_commit_time = 0
     repo_map = None
     functions = None
-    total_cost = 0.0
     num_exhausted_context_windows = 0
     num_malformed_responses = 0
     last_keyboard_interrupt = None
@@ -234,6 +233,8 @@ class Coder:
         self.chat_completion_response_hashes = []
         self.need_commit_before_edits = set()
 
+        self.total_cost = total_cost
+
         self.verbose = verbose
         self.abs_fnames = set()