diff --git a/aider/args.py b/aider/args.py
index 971f3c5cb..5e4b09f76 100644
--- a/aider/args.py
+++ b/aider/args.py
@@ -83,7 +83,7 @@ def get_parser(default_config_files, git_root):
         const=gpt_4_model,
         help=f"Use {gpt_4_model} model for the main chat",
     )
-    gpt_4o_model = "gpt-4o-2024-08-06"
+    gpt_4o_model = "gpt-4o"
     group.add_argument(
         "--4o",
         action="store_const",
diff --git a/aider/models.py b/aider/models.py
index 12e809c0f..0f629a500 100644
--- a/aider/models.py
+++ b/aider/models.py
@@ -69,7 +69,7 @@ MODEL_ALIASES = {
     "opus": "claude-3-opus-20240229",
     # GPT models
     "4": "gpt-4-0613",
-    "4o": "gpt-4o-2024-08-06",
+    "4o": "gpt-4o",
     "4-turbo": "gpt-4-1106-preview",
     "35turbo": "gpt-3.5-turbo",
     "35-turbo": "gpt-3.5-turbo",