diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index 44ee67957..e17568f74 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -36,6 +36,8 @@ from aider.utils import format_content, format_messages, format_tokens, is_image
 from ..dump import dump  # noqa: F401
 from .chat_chunks import ChatChunks
 
+REASONING_TAG = "reasoning-content-" + "7bbeb8e1441453ad999a0bbba8a46d4b"
+
 
 class UnknownEditFormat(ValueError):
     def __init__(self, edit_format, valid_formats):
@@ -1306,6 +1308,8 @@ class Coder:
 
         litellm_ex = LiteLLMExceptions()
 
+        self.got_reasoning_content = False
+        self.ended_reasoning_content = False
         self.usage_report = None
         exhausted = False
         interrupted = False
@@ -1372,8 +1376,15 @@ class Coder:
                 self.mdstream = None
 
             self.partial_response_content = self.get_multi_response_content_in_progress(True)
+
+            if self.got_reasoning_content:
+                reasoning_tag = REASONING_TAG
+            else:
+                reasoning_tag = None
+
             self.partial_response_content = self.main_model.remove_reasoning_content(
-                self.partial_response_content
+                self.partial_response_content,
+                reasoning_tag=reasoning_tag,
             )
             self.multi_response_content = ""
 
@@ -1744,9 +1755,23 @@ class Coder:
             except AttributeError:
                 pass
 
+            try:
+                text = chunk.choices[0].delta.reasoning_content
+                if text:
+                    self.got_reasoning_content = True
+                    self.partial_response_content += text
+                    received_content = True
+            except AttributeError:
+                text = None
+
             try:
                 text = chunk.choices[0].delta.content
                 if text:
+                    if self.got_reasoning_content and not self.ended_reasoning_content:
+                        tag = f"\n\n------\n\n</{REASONING_TAG}>\n\n"
+                        self.partial_response_content += tag
+                        self.ended_reasoning_content = True
+
                     self.partial_response_content += text
                     received_content = True
             except AttributeError:
diff --git a/aider/models.py b/aider/models.py
index 4b145d446..683daed83 100644
--- a/aider/models.py
+++ b/aider/models.py
@@ -625,7 +625,7 @@ class Model(ModelSettings):
             kwargs["num_ctx"] = num_ctx
         key = json.dumps(kwargs, sort_keys=True).encode()
 
-        # dump(kwargs)
+        dump(kwargs)
 
         hash_object = hashlib.sha1(key)
         if "timeout" not in kwargs:
@@ -633,17 +633,20 @@ class Model(ModelSettings):
         res = litellm.completion(**kwargs)
         return hash_object, res
 
-    def remove_reasoning_content(self, res):
-        if not self.remove_reasoning:
+    def remove_reasoning_content(self, res, reasoning_tag=None):
+        if not reasoning_tag:
+            reasoning_tag = self.remove_reasoning
+
+        if not reasoning_tag:
             return res
 
         # Try to match the complete tag pattern first
-        pattern = f"<{self.remove_reasoning}>.*?</{self.remove_reasoning}>"
+        pattern = f"<{reasoning_tag}>.*?</{reasoning_tag}>"
         res = re.sub(pattern, "", res, flags=re.DOTALL).strip()
 
         # If closing tag exists but opening tag might be missing, remove everything before closing
         # tag
-        closing_tag = f"</{self.remove_reasoning}>"
+        closing_tag = f"</{reasoning_tag}>"
         if closing_tag in res:
             # Split on the closing tag and keep everything after it
             parts = res.split(closing_tag, 1)