diff --git a/.github/workflows/gardener-investigate-issue.yml b/.github/workflows/gardener-investigate-issue.yml
index 37082f4d802..3e7b26b0a8d 100644
--- a/.github/workflows/gardener-investigate-issue.yml
+++ b/.github/workflows/gardener-investigate-issue.yml
@@ -86,6 +86,7 @@ jobs:
             Always return an investigation report as the `report` field in your structured output.
             If you identify a straightforward fix, describe the proposed fix in the report instead of implementing it.
           claude_args: |
+            --model claude-opus-latest
             --json-schema '{"type":"object","properties":{"report":{"type":"string","description":"The full investigation report markdown"}},"required":["report"]}'
 
       - name: Write report to job summary
diff --git a/.github/workflows/maintenance-prs.yml b/.github/workflows/maintenance-prs.yml
index 1adc0ad513e..ef6e06030c0 100644
--- a/.github/workflows/maintenance-prs.yml
+++ b/.github/workflows/maintenance-prs.yml
@@ -99,6 +99,7 @@ jobs:
             Keep duplicate-check notes out of the PR body and all template checkboxes unchecked.
             Do not post to Slack; the workflow will announce the PR after it exists.
           claude_args: |
+            --model claude-opus-latest
             --allowedTools Read,Glob,Grep,Edit,Write,Bash
 
       - name: Find the created PR