diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index 61a1953bb..48bd2ddd3 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -444,70 +444,18 @@ class Coder:
         on_backoff=lambda details: print(f"Retry in {details['wait']} seconds."),
     )
     def send_with_retries(self, model, messages):
-        _functions = [
-            dict(
-                name="replace_lines",
-                description="replace a block of contiguous lines with a new set of lines",
-                parameters=dict(
-                    type="object",
-                    required=["file_path", "original_lines", "updated_lines"],
-                    properties=dict(
-                        file_path=dict(
-                            type="string",
-                            description="path of file to edit",
-                        ),
-                        original_lines=dict(
-                            type="string",
-                            description=(
-                                "block of contiguous lines from the file (including newlines)"
-                            ),
-                        ),
-                        updated_lines=dict(
-                            type="string",
-                            description=(
-                                "block of contiguous lines from the file (including newlines)"
-                            ),
-                        ),
-                    ),
-                ),
-            ),
-        ]
-        functions = [
-            dict(
-                name="write_file",
-                description="create or update a file",
-                parameters=dict(
-                    type="object",
-                    required=["explanation", "file_path", "file_content"],
-                    properties=dict(
-                        explanation=dict(
-                            type="string",
-                            description=(
-                                "Explanation of the changes to be made to the code (markdown"
-                                " format)"
-                            ),
-                        ),
-                        file_path=dict(
-                            type="string",
-                            description="Path of file to write",
-                        ),
-                        file_content=dict(
-                            type="string",
-                            description="Content to write to the file",
-                        ),
-                    ),
-                ),
-            ),
-        ]
-        dump(functions)
-
-        res = openai.ChatCompletion.create(
+        kwargs = dict(
             model=model,
             messages=messages,
             temperature=0,
-            stream=False,
-            functions=functions,
+            stream=True,
         )
+        if self.functions:
+            kwargs["functions"] = self.functions
+
+        res = openai.ChatCompletion.create(**kwargs)
+        return res
+
         dump(res)
         msg = res.choices[0].message
         dump(msg)
@@ -543,12 +491,13 @@ class Coder:
                 live.start()
 
             for chunk in completion:
-                if chunk.choices[0].finish_reason not in (None, "stop"):
+                dump(chunk)
+                if chunk.choices[0].finish_reason not in (None, "stop", "function_call"):
                     assert False, "Exceeded context window!"
 
                 try:
                     func = chunk.choices[0].delta.function_call
-                    dump(func)
+                    print(func)
                 except AttributeError:
                     pass
 
diff --git a/aider/coders/func_coder.py b/aider/coders/func_coder.py
index 732f961ef..72bc914b5 100644
--- a/aider/coders/func_coder.py
+++ b/aider/coders/func_coder.py
@@ -8,6 +8,33 @@ from .func_prompts import FunctionPrompts
 
 
 class FunctionCoder(Coder):
+    functions = [
+        dict(
+            name="write_file",
+            description="create or update a file",
+            parameters=dict(
+                type="object",
+                required=["explanation", "file_path", "file_content"],
+                properties=dict(
+                    explanation=dict(
+                        type="string",
+                        description=(
+                            "Explanation of the changes to be made to the code (markdown format)"
+                        ),
+                    ),
+                    file_path=dict(
+                        type="string",
+                        description="Path of file to write",
+                    ),
+                    file_content=dict(
+                        type="string",
+                        description="Content to write to the file",
+                    ),
+                ),
+            ),
+        ),
+    ]
+
     def __init__(self, *args, **kwargs):
         self.gpt_prompts = FunctionPrompts()
         super().__init__(*args, **kwargs)