diff --git a/.github/workflows/claude-dedupe-issues.yml b/.github/workflows/claude-dedupe-issues.yml
index 9776b605..afcdf9f5 100644
--- a/.github/workflows/claude-dedupe-issues.yml
+++ b/.github/workflows/claude-dedupe-issues.yml
@@ -27,6 +27,7 @@ jobs:
         with:
           prompt: "/dedupe ${{ github.repository }}/issues/${{ github.event.issue.number || inputs.issue_number }}"
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+          claude_args: "--model claude-sonnet-4-5-20250929"
           claude_env: |
             GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
diff --git a/.github/workflows/claude-issue-triage.yml b/.github/workflows/claude-issue-triage.yml
index d534053e..49f3d547 100644
--- a/.github/workflows/claude-issue-triage.yml
+++ b/.github/workflows/claude-issue-triage.yml
@@ -102,5 +102,6 @@ jobs:
           timeout_minutes: "5"
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
           mcp_config: /tmp/mcp-config/mcp-servers.json
+          claude_args: "--model claude-sonnet-4-5-20250929"
           claude_env: |
             GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index 7cccc9c4..ab28f5fc 100644
--- a/.github/workflows/claude.yml
+++ b/.github/workflows/claude.yml
@@ -34,4 +34,5 @@ jobs:
         uses: anthropics/claude-code-action@beta
         with:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+          claude_args: "--model claude-sonnet-4-5-20250929"