diff --git a/llama_stack/providers/inline/vector_io/faiss/faiss.py b/llama_stack/providers/inline/vector_io/faiss/faiss.py
index d119b6d2a..edee4649d 100644
--- a/llama_stack/providers/inline/vector_io/faiss/faiss.py
+++ b/llama_stack/providers/inline/vector_io/faiss/faiss.py
@@ -289,7 +289,8 @@ class FaissVectorIOAdapter(OpenAIVectorStoreMixin, VectorIO, VectorDBsProtocolPr
 
         return await index.query_chunks(query, params)
 
-    async def delete_chunk(self, store_id: str, chunk_id: str) -> None:
+    async def delete_chunks(self, store_id: str, chunk_ids: list[str]) -> None:
         """Delete a chunk from a faiss index"""
         faiss_index = self.cache[store_id].index
-        await faiss_index.delete_chunk(chunk_id)
+        for chunk_id in chunk_ids:
+            await faiss_index.delete_chunk(chunk_id)
diff --git a/llama_stack/providers/inline/vector_io/sqlite_vec/sqlite_vec.py b/llama_stack/providers/inline/vector_io/sqlite_vec/sqlite_vec.py
index 1c4165e46..cfa4e2263 100644
--- a/llama_stack/providers/inline/vector_io/sqlite_vec/sqlite_vec.py
+++ b/llama_stack/providers/inline/vector_io/sqlite_vec/sqlite_vec.py
@@ -550,11 +550,12 @@ class SQLiteVecVectorIOAdapter(OpenAIVectorStoreMixin, VectorIO, VectorDBsProtoc
             raise ValueError(f"Vector DB {vector_db_id} not found")
         return await index.query_chunks(query, params)
 
-    async def delete_chunk(self, store_id: str, chunk_id: str) -> None:
+    async def delete_chunks(self, store_id: str, chunk_ids: list[str]) -> None:
         """Delete a chunk from a sqlite_vec index."""
         index = await self._get_and_cache_vector_db_index(store_id)
         if not index:
             raise ValueError(f"Vector DB {store_id} not found")
 
-        # Use the index's delete_chunk method
-        await index.index.delete_chunk(chunk_id)
+        for chunk_id in chunk_ids:
+            # Use the index's delete_chunk method
+            await index.index.delete_chunk(chunk_id)
diff --git a/llama_stack/providers/remote/vector_io/chroma/chroma.py b/llama_stack/providers/remote/vector_io/chroma/chroma.py
index 5b3063823..1aec8e9f9 100644
--- a/llama_stack/providers/remote/vector_io/chroma/chroma.py
+++ b/llama_stack/providers/remote/vector_io/chroma/chroma.py
@@ -212,5 +212,5 @@ class ChromaVectorIOAdapter(OpenAIVectorStoreMixin, VectorIO, VectorDBsProtocolP
         self.cache[vector_db_id] = index
         return index
 
-    async def delete_chunk(self, store_id: str, chunk_id: str) -> None:
+    async def delete_chunks(self, store_id: str, chunk_ids: list[str]) -> None:
         raise NotImplementedError("OpenAI Vector Stores API is not supported in Chroma")
diff --git a/llama_stack/providers/remote/vector_io/milvus/milvus.py b/llama_stack/providers/remote/vector_io/milvus/milvus.py
index 67839a67c..f1652a80e 100644
--- a/llama_stack/providers/remote/vector_io/milvus/milvus.py
+++ b/llama_stack/providers/remote/vector_io/milvus/milvus.py
@@ -380,11 +380,12 @@ class MilvusVectorIOAdapter(OpenAIVectorStoreMixin, VectorIO, VectorDBsProtocolP
 
         return await index.query_chunks(query, params)
 
-    async def delete_chunk(self, store_id: str, chunk_id: str) -> None:
+    async def delete_chunks(self, store_id: str, chunk_ids: list[str]) -> None:
         """Delete a chunk from a milvus vector store."""
         index = await self._get_and_cache_vector_db_index(store_id)
         if not index:
             raise ValueError(f"Vector DB {store_id} not found")
 
-        # Use the index's delete_chunk method
-        await index.index.delete_chunk(chunk_id)
+        for chunk_id in chunk_ids:
+            # Use the index's delete_chunk method
+            await index.index.delete_chunk(chunk_id)
diff --git a/llama_stack/providers/remote/vector_io/pgvector/pgvector.py b/llama_stack/providers/remote/vector_io/pgvector/pgvector.py
index b83e1d916..643c27328 100644
--- a/llama_stack/providers/remote/vector_io/pgvector/pgvector.py
+++ b/llama_stack/providers/remote/vector_io/pgvector/pgvector.py
@@ -271,11 +271,12 @@ class PGVectorVectorIOAdapter(OpenAIVectorStoreMixin, VectorIO, VectorDBsProtoco
         self.cache[vector_db_id] = VectorDBWithIndex(vector_db, index, self.inference_api)
         return self.cache[vector_db_id]
 
-    async def delete_chunk(self, store_id: str, chunk_id: str) -> None:
+    async def delete_chunks(self, store_id: str, chunk_ids: list[str]) -> None:
         """Delete a chunk from a PostgreSQL vector store."""
         index = await self._get_and_cache_vector_db_index(store_id)
         if not index:
             raise ValueError(f"Vector DB {store_id} not found")
 
-        # Use the index's delete_chunk method
-        await index.index.delete_chunk(chunk_id)
+        for chunk_id in chunk_ids:
+            # Use the index's delete_chunk method
+            await index.index.delete_chunk(chunk_id)
diff --git a/llama_stack/providers/remote/vector_io/qdrant/qdrant.py b/llama_stack/providers/remote/vector_io/qdrant/qdrant.py
index 9dad37da1..3df3da27f 100644
--- a/llama_stack/providers/remote/vector_io/qdrant/qdrant.py
+++ b/llama_stack/providers/remote/vector_io/qdrant/qdrant.py
@@ -311,5 +311,5 @@ class QdrantVectorIOAdapter(VectorIO, VectorDBsProtocolPrivate):
     ) -> VectorStoreFileObject:
         raise NotImplementedError("OpenAI Vector Stores API is not supported in Qdrant")
 
-    async def delete_chunk(self, store_id: str, chunk_id: str) -> None:
+    async def delete_chunks(self, store_id: str, chunk_ids: list[str]) -> None:
         raise NotImplementedError("OpenAI Vector Stores API is not supported in Qdrant")
diff --git a/llama_stack/providers/remote/vector_io/weaviate/weaviate.py b/llama_stack/providers/remote/vector_io/weaviate/weaviate.py
index 2027604c7..543835e20 100644
--- a/llama_stack/providers/remote/vector_io/weaviate/weaviate.py
+++ b/llama_stack/providers/remote/vector_io/weaviate/weaviate.py
@@ -268,5 +268,5 @@ class WeaviateVectorIOAdapter(
     async def _delete_openai_vector_store_file_from_storage(self, store_id: str, file_id: str) -> None:
         raise NotImplementedError("OpenAI Vector Stores API is not supported in Weaviate")
 
-    async def delete_chunk(self, store_id: str, chunk_id: str) -> None:
+    async def delete_chunks(self, store_id: str, chunk_ids: list[str]) -> None:
         raise NotImplementedError("OpenAI Vector Stores API is not supported in Weaviate")
diff --git a/llama_stack/providers/utils/memory/openai_vector_store_mixin.py b/llama_stack/providers/utils/memory/openai_vector_store_mixin.py
index 3767821c3..ee69d7c52 100644
--- a/llama_stack/providers/utils/memory/openai_vector_store_mixin.py
+++ b/llama_stack/providers/utils/memory/openai_vector_store_mixin.py
@@ -153,7 +153,7 @@ class OpenAIVectorStoreMixin(ABC):
         self.openai_vector_stores = await self._load_openai_vector_stores()
 
     @abstractmethod
-    async def delete_chunk(self, store_id: str, chunk_id: str) -> None:
+    async def delete_chunks(self, store_id: str, chunk_ids: list[str]) -> None:
         """Delete a chunk from a vector store."""
         pass
 
@@ -770,9 +770,7 @@ class OpenAIVectorStoreMixin(ABC):
 
         dict_chunks = await self._load_openai_vector_store_file_contents(vector_store_id, file_id)
         chunks = [Chunk.model_validate(c) for c in dict_chunks]
-        for c in chunks:
-            if c.chunk_id:
-                await self.delete_chunk(vector_store_id, str(c.chunk_id))
+        await self.delete_chunks(vector_store_id, [str(c.chunk_id) for c in chunks if c.chunk_id])
 
         store_info = self.openai_vector_stores[vector_store_id].copy()