diff --git a/action/build-review-prompt.sh b/action/build-review-prompt.sh
index 0b450b8dbd..879bd82bd3 100755
--- a/action/build-review-prompt.sh
+++ b/action/build-review-prompt.sh
@@ -22,7 +22,6 @@ set -euo pipefail
 MAX_DIFF_CHARS=15000        # Per-file diff limit
 MAX_FILE_CHARS=30000        # Per-file content limit
 MAX_PROMPT_CHARS=100000     # Overall prompt limit
-MODEL_THRESHOLD_FILES=5     # Use opus for PRs with more than this many files
 
 # Files to skip (generated, binary, lock files)
 SKIP_PATTERNS=(
@@ -221,11 +220,8 @@ build_prompt() {
     local file_count
     file_count=$(echo "$files_json" | jq 'length')
 
-    # Determine model based on file count
-    local model="haiku"
-    if [[ "$file_count" -gt "$MODEL_THRESHOLD_FILES" ]]; then
-        model="opus"
-    fi
+    # Always use opus for reviews
+    local model="opus"
 
     # Fetch review rules
     local review_rules