diff --git a/src/app/api/provider-models/route.ts b/src/app/api/provider-models/route.ts
index 40c81a687b..4956aaf962 100644
--- a/src/app/api/provider-models/route.ts
+++ b/src/app/api/provider-models/route.ts
@@ -4,6 +4,7 @@ import {
   addCustomModel,
   removeCustomModel,
   replaceCustomModels,
+  deleteSyncedAvailableModelsForProvider,
   updateCustomModel,
   getModelCompatOverrides,
   mergeModelCompatOverride,
@@ -369,9 +370,12 @@ export async function DELETE(request) {
     const all = searchParams.get("all");
     if (all === "true") {
       await replaceCustomModels(provider, [], { allowEmpty: true });
+      const syncedAvailableModelListsRemoved =
+        await deleteSyncedAvailableModelsForProvider(provider);
       const removedAliases = await deleteManagedAvailableModelAliasesForProvider(provider);
       return Response.json({
         cleared: true,
+        syncedAvailableModelListsRemoved,
         aliasChanges: { removed: removedAliases, assigned: [] },
       });
     }
diff --git a/src/lib/db/models.ts b/src/lib/db/models.ts
index f749a4ffc8..2520ada8fa 100644
--- a/src/lib/db/models.ts
+++ b/src/lib/db/models.ts
@@ -707,6 +707,22 @@ export async function deleteSyncedAvailableModelsForConnection(
   return getSyncedAvailableModels(providerId);
 }
 
+/**
+ * Delete all synced models for every connection belonging to a provider.
+ * Returns the number of connection-scoped synced model lists removed.
+ */
+export async function deleteSyncedAvailableModelsForProvider(providerId: string): Promise<number> {
+  const db = getDbInstance();
+  const keyPrefix = `${providerId}:`;
+  const result = db
+    .prepare(
+      "DELETE FROM key_value WHERE namespace = 'syncedAvailableModels' AND substr(key, 1, ?) = ?"
+    )
+    .run(keyPrefix.length, keyPrefix);
+  backupDbFile("pre-write");
+  return Number(result.changes || 0);
+}
+
 export async function updateCustomModel(
   providerId: string,
   modelId: string,
diff --git a/src/lib/localDb.ts b/src/lib/localDb.ts
index f3af94bc83..65a5681e08 100755
--- a/src/lib/localDb.ts
+++ b/src/lib/localDb.ts
@@ -65,6 +65,7 @@ export {
   getAllSyncedAvailableModels,
   replaceSyncedAvailableModelsForConnection,
   deleteSyncedAvailableModelsForConnection,
+  deleteSyncedAvailableModelsForProvider,
 } from "./db/models";
 
 export type { ModelCompatPerProtocol, ModelCompatPatch, SyncedAvailableModel } from "./db/models";