diff --git a/aider/sendchat.py b/aider/sendchat.py
index 6678b5ed2..fd581898b 100644
--- a/aider/sendchat.py
+++ b/aider/sendchat.py
@@ -52,9 +52,7 @@ def send_completion(
     functions,
     stream,
     temperature=0,
-    extra_headers=None,
-    extra_body=None,
-    max_tokens=None,
+    extra_params=None,
 ):
     from aider.llm import litellm
 
@@ -70,12 +68,9 @@ def send_completion(
         function = functions[0]
         kwargs["tools"] = [dict(type="function", function=function)]
         kwargs["tool_choice"] = {"type": "function", "function": {"name": function["name"]}}
-    if extra_headers is not None:
-        kwargs["extra_headers"] = extra_headers
-    if extra_body is not None:
-        kwargs["extra_body"] = extra_body
-    if max_tokens is not None:
-        kwargs["max_tokens"] = max_tokens
+    
+    if extra_params is not None:
+        kwargs.update(extra_params)
 
     key = json.dumps(kwargs, sort_keys=True).encode()
 
@@ -85,8 +80,6 @@ def send_completion(
     if not stream and CACHE is not None and key in CACHE:
         return hash_object, CACHE[key]
 
-    # del kwargs['stream']
-
     res = litellm.completion(**kwargs)
 
     if not stream and CACHE is not None:
@@ -96,7 +89,7 @@ def send_completion(
 
 
 @lazy_litellm_retry_decorator
-def simple_send_with_retries(model_name, messages, extra_headers=None, extra_body=None):
+def simple_send_with_retries(model_name, messages, extra_params=None):
     try:
         kwargs = {
             "model_name": model_name,
@@ -104,10 +97,8 @@ def simple_send_with_retries(model_name, messages, extra_headers=None, extra_bod
             "functions": None,
             "stream": False,
         }
-        if extra_headers is not None:
-            kwargs["extra_headers"] = extra_headers
-        if extra_body is not None:
-            kwargs["extra_body"] = extra_body
+        if extra_params is not None:
+            kwargs["extra_params"] = extra_params
 
         _hash, response = send_completion(**kwargs)
         return response.choices[0].message.content