diff --git a/src/app/(dashboard)/dashboard/providers/[id]/page.tsx b/src/app/(dashboard)/dashboard/providers/[id]/page.tsx
index acbd90d8df..37b3e4218d 100644
--- a/src/app/(dashboard)/dashboard/providers/[id]/page.tsx
+++ b/src/app/(dashboard)/dashboard/providers/[id]/page.tsx
@@ -1051,7 +1051,7 @@ export default function ProviderDetailPage() {
         name: cm.name || cm.id,
         source: cm.source === "api-sync" ? "api-sync" : "custom",
       }));
-    return [...builtInModels, ...syncedExtras, ...customExtras];
+    return [...builtInModels, ...syncedExtras];
   }, [providerId, registryModels, syncedAvailableModels, modelMeta.customModels]);
   const providerAlias = getProviderAlias(providerId);
   const isManagedAvailableModelsProvider = isCompatible || providerId === "openrouter";
@@ -2680,11 +2680,7 @@ export default function ProviderDetailPage() {
               </p>
             </div>
             <div className="flex items-center gap-2">
-              <Button
-                size="sm"
-                icon="add"
-                onClick={() => setShowAddApiKeyModal(true)}
-              >
+              <Button size="sm" icon="add" onClick={() => setShowAddApiKeyModal(true)}>
                 {t("add")}
               </Button>
               <Button
@@ -3076,15 +3072,13 @@ export default function ProviderDetailPage() {
           {renderModelsSection()}
 
           {/* Custom Models — available for all providers */}
-          {!isManagedAvailableModelsProvider && (
-            <CustomModelsSection
-              providerId={providerId}
-              providerAlias={providerDisplayAlias}
-              copied={copied}
-              onCopy={copy}
-              onModelsChanged={fetchProviderModelMeta}
-            />
-          )}
+          <CustomModelsSection
+            providerId={providerId}
+            providerAlias={providerDisplayAlias}
+            copied={copied}
+            onCopy={copy}
+            onModelsChanged={fetchProviderModelMeta}
+          />
         </Card>
       )}
 
@@ -3875,6 +3869,7 @@ function CustomModelsSection({
   const [editingApiFormat, setEditingApiFormat] = useState("chat-completions");
   const [editingEndpoints, setEditingEndpoints] = useState<string[]>(["chat"]);
   const [savingModelId, setSavingModelId] = useState<string | null>(null);
+  const [togglingModelId, setTogglingModelId] = useState<string | null>(null);
 
   const customMap = useMemo(() => buildCompatMap(customModels), [customModels]);
   const overrideMap = useMemo(() => buildCompatMap(modelCompatOverrides), [modelCompatOverrides]);
@@ -3943,6 +3938,28 @@ function CustomModelsSection({
     }
   };
 
+  const handleToggleHidden = async (modelId: string, hidden: boolean) => {
+    setTogglingModelId(modelId);
+    try {
+      const res = await fetch(
+        `/api/provider-models?provider=${encodeURIComponent(providerId)}&modelId=${encodeURIComponent(modelId)}`,
+        {
+          method: "PATCH",
+          headers: { "Content-Type": "application/json" },
+          body: JSON.stringify({ isHidden: hidden }),
+        }
+      );
+      if (res.ok) {
+        await fetchCustomModels();
+        onModelsChanged?.();
+      }
+    } catch (e) {
+      console.error("Failed to toggle model visibility:", e);
+    } finally {
+      setTogglingModelId(null);
+    }
+  };
+
   const beginEdit = (model) => {
     setEditingModelId(model.id);
     setEditingApiFormat(model.apiFormat || "chat-completions");
@@ -4311,6 +4328,16 @@ function CustomModelsSection({
                     showDeveloperToggle
                     disabled={savingModelId === model.id}
                   />
+                  <button
+                    onClick={() => handleToggleHidden(model.id, !model.isHidden)}
+                    disabled={togglingModelId === model.id}
+                    className="rounded p-1 text-text-muted hover:bg-sidebar hover:text-primary disabled:opacity-50"
+                    title={model.isHidden ? t("unhideModel") : t("hideModel")}
+                  >
+                    <span className="material-symbols-outlined text-sm">
+                      {model.isHidden ? "visibility_off" : "visibility"}
+                    </span>
+                  </button>
                   <button
                     onClick={() => handleRemove(model.id)}
                     className="rounded p-1 text-red-500 hover:bg-red-50"
diff --git a/src/app/(dashboard)/dashboard/settings/components/ProxyRegistryManager.tsx b/src/app/(dashboard)/dashboard/settings/components/ProxyRegistryManager.tsx
index fb596eb383..b673d92f22 100644
--- a/src/app/(dashboard)/dashboard/settings/components/ProxyRegistryManager.tsx
+++ b/src/app/(dashboard)/dashboard/settings/components/ProxyRegistryManager.tsx
@@ -545,7 +545,15 @@ export default function ProxyRegistryManager() {
         title={editingId ? t("modalEditTitle") : t("modalCreateTitle")}
         maxWidth="lg"
       >
-        <div className="flex flex-col gap-3">
+        <form
+          className="flex flex-col gap-3"
+          onSubmit={(e) => {
+            e.preventDefault();
+            handleSave();
+          }}
+          autoComplete="off"
+          data-1p-ignore="true"
+        >
           <div className="grid grid-cols-2 gap-3">
             <div>
               <label className="text-xs text-text-muted mb-1 block">{t("labelName")}</label>
@@ -643,7 +651,7 @@ export default function ProxyRegistryManager() {
               Save
             </Button>
           </div>
-        </div>
+        </form>
       </Modal>
 
       <Modal
diff --git a/src/app/api/providers/route.ts b/src/app/api/providers/route.ts
index 55b436b46c..5f381f3355 100644
--- a/src/app/api/providers/route.ts
+++ b/src/app/api/providers/route.ts
@@ -105,12 +105,7 @@ export async function POST(request: Request) {
       }
 
       const existingConnections = await getProviderConnections({ provider });
-      if (!allowMultipleCompatibleConnections && existingConnections.length > 0) {
-        return NextResponse.json(
-          { error: "Only one connection is allowed for this OpenAI Compatible node" },
-          { status: 400 }
-        );
-      }
+      // Allow multiple connections for compatible nodes exactly like first-party providers
 
       providerSpecificData = {
         ...(providerSpecificData || {}),
@@ -135,12 +130,7 @@ export async function POST(request: Request) {
       }
 
       const existingConnections = await getProviderConnections({ provider });
-      if (!allowMultipleCompatibleConnections && existingConnections.length > 0) {
-        return NextResponse.json(
-          { error: "Only one connection is allowed for this Anthropic Compatible node" },
-          { status: 400 }
-        );
-      }
+      // Allow multiple connections for compatible nodes exactly like first-party providers
 
       providerSpecificData = {
         ...(providerSpecificData || {}),