diff --git a/oh-my-opencode.jsonc b/oh-my-opencode.jsonc
index e1180df..434e7ee 100644
--- a/oh-my-opencode.jsonc
+++ b/oh-my-opencode.jsonc
@@ -2,7 +2,7 @@
   "$schema": "https://raw.githubusercontent.com/code-yeongyu/oh-my-opencode/master/assets/oh-my-opencode.schema.json",
   "agents": {
     "sisyphus": { "model": "anthropic/claude-opus-4-6", "variant": "high" },
-    "hephaestus": { "model": "openai/gpt-5.3-codx", "variant": "medium" },
+    "hephaestus": { "model": "openai/gpt-5.3-codex", "variant": "medium" },
     "oracle": { "model": "openai/gpt-5.4", "variant": "high" },
     "librarian": { "model": "google/gemini-3-flash-preview" },
     "explore": { "model": "litellm/grok-code-fast-1" },