diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index 719c5af69..8e4404395 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -1381,11 +1381,7 @@ class Coder:
                 self.mdstream = None
 
             self.partial_response_content = self.get_multi_response_content_in_progress(True)
-
-            self.partial_response_content = self.remove_reasoning_content(
-                self.partial_response_content,
-                self.reasoning_tag_name,
-            )
+            self.remove_reasoning_content()
             self.multi_response_content = ""
 
         ###
@@ -1833,9 +1829,13 @@ class Coder:
     def render_incremental_response(self, final):
         return self.get_multi_response_content_in_progress()
 
-    def remove_reasoning_content(self, content, reasoning_tag_name):
+    def remove_reasoning_content(self):
         """Remove reasoning content from the model's response."""
-        return self.main_model.remove_reasoning_content(content, reasoning_tag_name)
+
+        self.partial_response_content = self.main_model.remove_reasoning_content(
+            self.partial_response_content,
+            self.reasoning_tag_name,
+        )
 
     def calculate_and_show_tokens_and_cost(self, messages, completion=None):
         prompt_tokens = 0
diff --git a/tests/basic/test_reasoning.py b/tests/basic/test_reasoning.py
index aa6c71f74..fd44af80d 100644
--- a/tests/basic/test_reasoning.py
+++ b/tests/basic/test_reasoning.py
@@ -59,6 +59,7 @@ class TestReasoning(unittest.TestCase):
             self.assertIn(main_content, output)
 
             # Verify that partial_response_content only contains the main content
+            coder.remove_reasoning_content()
             self.assertEqual(coder.partial_response_content.strip(), main_content.strip())
 
             # Ensure proper order: reasoning first, then main content
@@ -168,12 +169,10 @@ class TestReasoning(unittest.TestCase):
             )
 
             # Verify that partial_response_content only contains the main content
+            coder.remove_reasoning_content()
             expected_content = "Final answer after reasoning"
             self.assertEqual(coder.partial_response_content.strip(), expected_content)
 
-            # Verify that partial_response_content only contains the main content
-            self.assertEqual(coder.partial_response_content.strip(), "Final answer after reasoning")
-
     def test_send_with_think_tags(self):
         """Test that <think> tags are properly processed and formatted."""
         # Setup IO with no pretty
@@ -240,6 +239,7 @@ class TestReasoning(unittest.TestCase):
             )
 
             # Verify that partial_response_content only contains the main content
+            coder.remove_reasoning_content()
             self.assertEqual(coder.partial_response_content.strip(), main_content.strip())
 
     def test_send_with_think_tags_stream(self):