diff --git a/modelscope/hub/api.py b/modelscope/hub/api.py
index 8c3570c5..5c8e855e 100644
--- a/modelscope/hub/api.py
+++ b/modelscope/hub/api.py
@@ -32,6 +32,7 @@ from modelscope.hub.constants import (API_HTTP_CLIENT_MAX_RETRIES,
                                       API_RESPONSE_FIELD_DATA,
                                       API_RESPONSE_FIELD_EMAIL,
                                       API_RESPONSE_FIELD_GIT_ACCESS_TOKEN,
+                                      API_RESPONSE_FIELD_MESSAGE,
                                       API_RESPONSE_FIELD_USERNAME,
                                       DEFAULT_CREDENTIALS_PATH,
                                       DEFAULT_MAX_WORKERS,
@@ -372,6 +373,7 @@ class HubApi:
                 set in HubApi class (self.endpoint)
             re_raise(`bool`):
                 raise exception when error
+            token (`str`, *optional*): access token to use for checking existence.
         Returns:
             True if the repository exists, False otherwise.
         """
@@ -1426,6 +1428,7 @@ class HubApi:
             endpoint (Optional[str]): The endpoint to use.
                 In the format of `https://www.modelscope.cn` or 'https://www.modelscope.ai'
             exist_ok (Optional[bool]): If the repo exists, whether to return the repo url directly.
+            create_default_config (Optional[bool]): If True, create a default configuration file in the model repo.
             **kwargs: The additional arguments.
 
         Returns:
@@ -1437,15 +1440,15 @@ class HubApi:
         if not endpoint:
             endpoint = self.endpoint
 
-        repo_exists: bool = self.repo_exists(repo_id, repo_type=repo_type, endpoint=endpoint)
+        self.login(access_token=token, endpoint=endpoint)
+
+        repo_exists: bool = self.repo_exists(repo_id, repo_type=repo_type, endpoint=endpoint, token=token)
         if repo_exists:
             if exist_ok:
                 return f'{endpoint}/{repo_type}s/{repo_id}'
             else:
                 raise ValueError(f'Repo {repo_id} already exists!')
 
-        self.login(access_token=token, endpoint=endpoint)
-
         repo_id_list = repo_id.split('/')
         if len(repo_id_list) != 2:
             raise ValueError('Invalid repo id, should be in the format of `owner_name/repo_name`')
@@ -2234,7 +2237,7 @@ class UploadingCheck:
             max_file_count: int = 100_000,
             max_file_count_in_dir: int = 50_000,
             max_file_size: int = 50 * 1024 ** 3,
-            size_threshold_to_enforce_lfs: int = 5 * 1024 * 1024,
+            size_threshold_to_enforce_lfs: int = 1 * 1024 * 1024,
             normal_file_size_total_limit: int = 500 * 1024 * 1024,
     ):
         self.max_file_count = max_file_count
diff --git a/modelscope/hub/file_download.py b/modelscope/hub/file_download.py
index 1090fceb..c323844e 100644
--- a/modelscope/hub/file_download.py
+++ b/modelscope/hub/file_download.py
@@ -462,7 +462,7 @@ def parallel_download(url: str,
         if end + 1 < file_size:
             tasks.append((file_path, progress, end + 1, file_size - 1, url,
                           file_name, cookies, headers))
-        parallels = MODELSCOPE_DOWNLOAD_PARALLELS if MODELSCOPE_DOWNLOAD_PARALLELS <= 4 else 4
+        parallels = min(MODELSCOPE_DOWNLOAD_PARALLELS, 16)
         # download every part
         with ThreadPoolExecutor(
                 max_workers=parallels,
diff --git a/modelscope/version.py b/modelscope/version.py
index b8e65a1d..92d737c2 100644
--- a/modelscope/version.py
+++ b/modelscope/version.py
@@ -1,5 +1,5 @@
 # Make sure to modify __release_datetime__ to release time when making official release.
-__version__ = '1.27.0'
+__version__ = '1.27.1'
 # default release datetime for branches under active development is set
 # to be a time far-far-away-into-the-future
 __release_datetime__ = '2025-06-12 23:59:59'