diff --git a/.github/actions/claude-pr-review/action.yml b/.github/actions/claude-pr-review/action.yml
index 4090660..f476e04 100644
--- a/.github/actions/claude-pr-review/action.yml
+++ b/.github/actions/claude-pr-review/action.yml
@@ -19,11 +19,12 @@ inputs:
     description: Additional prompt text appended after the canonical prompt.
   model:
     required: false
-    default: opus
+    default: claude-opus-4-7
     description: >
-      Model for the review agent, passed through to `claude --model`. Defaults
-      to `opus`; set to another model id to override, or empty to fall through
-      to the claude-code-action / CLI default (Sonnet class).
+      Model for the review agent, passed through to `claude --model`. Pinned to
+      `claude-opus-4-7` so reviews stay on a fixed model rather than following
+      the moving `opus` alias; set to another model id to override, or empty to
+      fall through to the claude-code-action / CLI default (Sonnet class).
   review_depth:
     required: false
     default: standard