@@ -1160,6 +1160,12 @@ def _GenerateContentConfig_to_mldev(
         getv(from_object, ['continuation_token']),
     )
 
+  if getv(from_object, ['generation_output_config']) is not None:
+    raise ValueError(
+        'generation_output_config parameter is only supported in Gemini'
+        ' Enterprise Agent Platform mode, not in Gemini Developer API mode.'
+    )
+
   return to_object
 
 
 
@@ -1349,6 +1349,12 @@ def _GenerateContentConfig_to_mldev(
         getv(from_object, ['continuation_token']),
     )
 
+  if getv(from_object, ['generation_output_config']) is not None:
+    raise ValueError(
+        'generation_output_config parameter is only supported in Gemini'
+        ' Enterprise Agent Platform mode, not in Gemini Developer API mode.'
+    )
+
   return to_object
 
 
@@ -1553,6 +1559,13 @@ def _GenerateContentConfig_to_vertex(
         getv(from_object, ['continuation_token']),
     )
 
+  if getv(from_object, ['generation_output_config']) is not None:
+    setv(
+        parent_object,
+        ['outputConfig'],
+        getv(from_object, ['generation_output_config']),
+    )
+
   return to_object
 
 
 
@@ -5932,6 +5932,37 @@ class ImageConfigDict(TypedDict, total=False):
 ImageConfigOrDict = Union[ImageConfig, ImageConfigDict]
 
 
+class GenerationOutputConfig(_common.BaseModel):
+  """Configuration for persisting output assets to external storage."""
+
+  output_uri_prefix: Optional[str] = Field(
+      default=None,
+      description="""Optional. The Cloud Storage URI prefix or directory where
+      generated media assets should be written (e.g. "gs://my-bucket/prefix/").
+      Supported URI schemes: "gs://". When set, media bytes are written directly
+      to this location and returned as FileData with a file_uri instead of raw
+      inline bytes.
+      """,
+  )
+
+
+class GenerationOutputConfigDict(TypedDict, total=False):
+  """Configuration for persisting output assets to external storage."""
+
+  output_uri_prefix: Optional[str]
+  """Optional. The Cloud Storage URI prefix or directory where
+      generated media assets should be written (e.g. "gs://my-bucket/prefix/").
+      Supported URI schemes: "gs://". When set, media bytes are written directly
+      to this location and returned as FileData with a file_uri instead of raw
+      inline bytes.
+      """
+
+
+GenerationOutputConfigOrDict = Union[
+    GenerationOutputConfig, GenerationOutputConfigDict
+]
+
+
 class FileStatus(_common.BaseModel):
   """Status of a File that uses a common error model."""
 
@@ -6756,6 +6787,12 @@ class GenerateContentConfig(_common.BaseModel):
       billing apply to each request. Set to false to turn this off.
       """,
   )
+  generation_output_config: Optional[GenerationOutputConfig] = Field(
+      default=None,
+      description="""Optional. Configuration for persisting output assets to external
+      storage.
+      """,
+  )
 
   @pydantic.field_validator('response_schema', mode='before')
   @classmethod
@@ -6990,6 +7027,11 @@ class GenerateContentConfigDict(TypedDict, total=False):
       billing apply to each request. Set to false to turn this off.
       """
 
+  generation_output_config: Optional[GenerationOutputConfigDict]
+  """Optional. Configuration for persisting output assets to external
+      storage.
+      """
+
 
 GenerateContentConfigOrDict = Union[
     GenerateContentConfig, GenerateContentConfigDict