diff --git a/src/openai/types/embedding.py b/src/openai/types/embedding.py
index 769b1d165f..50ba98d542 100644
--- a/src/openai/types/embedding.py
+++ b/src/openai/types/embedding.py
@@ -1,6 +1,8 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 from typing import List
+from typing import Union
+
 from typing_extensions import Literal
 
 from .._models import BaseModel
@@ -9,10 +11,12 @@
 
 
 class Embedding(BaseModel):
-    embedding: List[float]
-    """The embedding vector, which is a list of floats.
+    embedding: Union[List[float], str]
+    """The embedding vector, which can be either:
+    - a list of floats (if encoding_format is "float")
+    - a base64 encoded string (if encoding_format is "base64").
 
-    The length of vector depends on the model as listed in the
+    The length of the vector depends on the model as listed in the
     [embedding guide](https://platform.openai.com/docs/guides/embeddings).
     """