diff --git a/.github/workflows/dedupe-issues.yml b/.github/workflows/dedupe-issues.yml
index cb0a9c0931..a8c21edd01 100644
--- a/.github/workflows/dedupe-issues.yml
+++ b/.github/workflows/dedupe-issues.yml
@@ -27,7 +27,7 @@ jobs:
         with:
           prompt: "/dedupe ${{ github.repository }}/issues/${{ github.event.issue.number || inputs.issue_number }}"
           claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
-          claude_args: "--model claude-sonnet-4-5-20250929"
+          model: "claude-sonnet-4-5-20250929"
           claude_env: |
             GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}