diff --git a/backend/open_webui/retrieval/vector/dbs/s3vector.py b/backend/open_webui/retrieval/vector/dbs/s3vector.py
index 519ee5abad..bada99cde0 100644
--- a/backend/open_webui/retrieval/vector/dbs/s3vector.py
+++ b/backend/open_webui/retrieval/vector/dbs/s3vector.py
@@ -116,17 +116,19 @@ class S3VectorClient(VectorDBBase):
         return filtered_metadata
 
     def has_collection(self, collection_name: str) -> bool:
-        """
-        Check if a vector index (collection) exists in the S3 vector bucket.
-        """
-
-        try:
-            response = self.client.list_indexes(vectorBucketName=self.bucket_name)
-            indexes = response.get("indexes", [])
-            return any(idx.get("indexName") == collection_name for idx in indexes)
-        except Exception as e:
-            log.error(f"Error listing indexes: {e}")
-            return False
+          """
+          Check if a vector index exists using direct lookup.
+          This avoids pagination issues with list_indexes() and is significantly faster.
+          """
+          try:
+              self.client.get_index(
+                  vectorBucketName=self.bucket_name,
+                  indexName=collection_name
+              )
+              return True
+          except Exception as e:
+              log.error(f"Error checking if index '{collection_name}' exists: {e}")
+              return False
 
     def delete_collection(self, collection_name: str) -> None:
         """