diff --git a/apps/ai-game-creator-shell/src/features/project-workspace/ConversationModelSelect.tsx b/apps/ai-game-creator-shell/src/features/project-workspace/ConversationModelSelect.tsx
index 2c4796420..e2116c9a8 100644
--- a/apps/ai-game-creator-shell/src/features/project-workspace/ConversationModelSelect.tsx
+++ b/apps/ai-game-creator-shell/src/features/project-workspace/ConversationModelSelect.tsx
@@ -492,6 +492,28 @@ export function ConversationModelSelect({
           ) : null}
         </button>
       ))}
+      {/* 目录里存在但当前档位不可用的模型：不可点；原因通过 aria-label 与 hover 提示暴露，
+              且刻意不进入 Tab 序列，避免键盘用户在不可选项上停留。 */}
+      {unavailableModels.map((model) => {
+        const reasonLabel = unavailableModelReasonLabel(model.reason);
+        return (
+          <div
+            key={model.id}
+            role="option"
+            aria-selected={false}
+            aria-disabled="true"
+            aria-label={`${model.displayName}：${reasonLabel}`}
+            className="conversation-model-menu-option conversation-model-menu-option-locked"
+            data-reason={model.reason}
+            data-tooltip={reasonLabel}
+          >
+            <span className="conversation-model-menu-option-main">
+              <span>{model.displayName}</span>
+            </span>
+            <Lock size={13} aria-hidden="true" />
+          </div>
+        );
+      })}
       <div className="conversation-model-menu-divider" />
       <button
         type="button"