diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index 7d472c0e9..6548acd87 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -624,8 +624,12 @@ class Coder:
         )
         if functions is not None:
             kwargs["functions"] = self.functions
+
+        # we are abusing the openai object to stash these values
         if hasattr(openai, "api_deployment_id"):
             kwargs["deployment_id"] = openai.api_deployment_id
+        if hasattr(openai, "api_engine"):
+            kwargs["engine"] = openai.api_engine
 
         # Generate SHA1 hash of kwargs and append it to chat_completion_call_hashes
         hash_object = hashlib.sha1(json.dumps(kwargs, sort_keys=True).encode())
diff --git a/aider/main.py b/aider/main.py
index fe272073c..37146c181 100644
--- a/aider/main.py
+++ b/aider/main.py
@@ -76,22 +76,27 @@ def main(args=None, input=None, output=None):
     model_group.add_argument(
         "--openai-api-base",
         metavar="OPENAI_API_BASE",
-        help="Specify the OpenAI API base endpoint (default: https://api.openai.com/v1)",
+        help="Specify the openai.api_base (default: https://api.openai.com/v1)",
     )
     model_group.add_argument(
         "--openai-api-type",
         metavar="OPENAI_API_TYPE",
-        help="Specify the OpenAI API type",
+        help="Specify the openai.api_type",
     )
     model_group.add_argument(
         "--openai-api-version",
         metavar="OPENAI_API_VERSION",
-        help="Specify the OpenAI API version",
+        help="Specify the openai.api_version",
     )
     model_group.add_argument(
         "--openai-api-deployment-id",
         metavar="OPENAI_API_DEPLOYMENT_ID",
-        help="Specify the OpenAI API deployment ID",
+        help="Specify the deployment_id arg to be passed to openai.ChatCompletion.create()",
+    )
+    model_group.add_argument(
+        "--openai-api-engine",
+        metavar="OPENAI_API_ENGINE",
+        help="Specify the engine arg to be passed to openai.ChatCompletion.create()",
     )
     model_group.add_argument(
         "--edit-format",
@@ -348,7 +353,7 @@ def main(args=None, input=None, output=None):
     main_model = models.Model(args.model)
 
     openai.api_key = args.openai_api_key
-    for attr in ("base", "type", "version", "deployment_id"):
+    for attr in ("base", "type", "version", "deployment_id", "engine"):
         arg_key = f"openai_api_{attr}"
         val = getattr(args, arg_key)
         if val is not None: