diff --git a/skills/codex/SKILL.md b/skills/codex/SKILL.md
index 5f2b12a..1fc62fc 100644
--- a/skills/codex/SKILL.md
+++ b/skills/codex/SKILL.md
@@ -46,8 +46,8 @@ uv run ~/.claude/skills/codex/scripts/codex.py resume <session_id> "<task>" [mod
 ### Parameters
 
 - `task` (required): Task description, supports `@file` references
-- `model` (optional): Model to use (default: gpt-5-codex)
-  - `gpt-5-codex`: Default, optimized for code
+- `model` (optional): Model to use (default: gpt-5.1-codex)
+  - `gpt-5.1-codex`: Default, optimized for code
   - `gpt-5`: Fast general purpose
 - `working_dir` (optional): Working directory (default: current)
 
diff --git a/skills/codex/scripts/codex.py b/skills/codex/scripts/codex.py
index cb0be3f..4ff5e13 100755
--- a/skills/codex/scripts/codex.py
+++ b/skills/codex/scripts/codex.py
@@ -19,7 +19,7 @@ import sys
 import os
 from typing import Optional
 
-DEFAULT_MODEL = 'gpt-5.1'
+DEFAULT_MODEL = 'gpt-5.1-codex'
 DEFAULT_WORKDIR = '.'
 DEFAULT_TIMEOUT = 7200  # 2 hours in seconds
 FORCE_KILL_DELAY = 5