diff --git a/relay/channel/codex/constants.go b/relay/channel/codex/constants.go
index 8cdb2c38a..c4f66ae17 100644
--- a/relay/channel/codex/constants.go
+++ b/relay/channel/codex/constants.go
@@ -8,7 +8,7 @@ import (
 var baseModelList = []string{
 	"gpt-5", "gpt-5-codex", "gpt-5-codex-mini",
 	"gpt-5.1", "gpt-5.1-codex", "gpt-5.1-codex-max", "gpt-5.1-codex-mini",
-	"gpt-5.2", "gpt-5.2-codex",
+	"gpt-5.2", "gpt-5.2-codex", "gpt-5.3-codex",
 }
 
 var ModelList = withCompactModelSuffix(baseModelList)