diff --git a/lua/explain-it/config.lua b/lua/explain-it/config.lua
index e513440..bc20406 100644
--- a/lua/explain-it/config.lua
+++ b/lua/explain-it/config.lua
@@ -8,7 +8,7 @@ M.options = {
   debug = false,
   max_notification_width = 200,
   max_retries = 3,
-  openai_chat_model = "gpt-5",
+  openai_chat_model = "gpt-5.3-codex",
   openai_completion_model = "text-davinci-003",
   output_directory = "/tmp/explain_it_output",
   split_responses = true,