diff --git a/README.md b/README.md
index f388ab7..fd8c719 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,7 @@ jobs:
       with:
         OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
         OPENAI_BASE_URL: https://api.openai.com/v1
+        OPENAI_MODEL: ${{ vars.OPENAI_MODEL }}
     permissions:
       contents: write
       pull-requests: write
@@ -66,6 +67,7 @@ jobs:
       with:
         OPENAI_API_KEY: ${{ secrets.OPENROUTER_API_KEY }}  # OpenRouter 使用 OpenAI 相容介面，以 OPENAI_API_KEY 傳入
         OPENAI_BASE_URL: https://openrouter.ai/api/v1
+        OPENAI_MODEL: ${{ vars.OPENROUTER_MODEL }}
     permissions:
       contents: write
       pull-requests: write