diff --git a/google/genai/_interactions/types/__init__.py b/google/genai/_interactions/types/__init__.py
index a98193110..9d912448a 100644
--- a/google/genai/_interactions/types/__init__.py
+++ b/google/genai/_interactions/types/__init__.py
@@ -29,7 +29,6 @@
 from .error_event import ErrorEvent as ErrorEvent
 from .interaction import Interaction as Interaction
 from .model_param import ModelParam as ModelParam
-from .tool_choice import ToolChoice as ToolChoice
 from .usage_param import UsageParam as UsageParam
 from .content_stop import ContentStop as ContentStop
 from .image_config import ImageConfig as ImageConfig
@@ -52,7 +51,6 @@
 from .document_content import DocumentContent as DocumentContent
 from .tool_choice_type import ToolChoiceType as ToolChoiceType
 from .generation_config import GenerationConfig as GenerationConfig
-from .tool_choice_param import ToolChoiceParam as ToolChoiceParam
 from .document_mime_type import DocumentMimeType as DocumentMimeType
 from .image_config_param import ImageConfigParam as ImageConfigParam
 from .text_content_param import TextContentParam as TextContentParam
diff --git a/google/genai/_interactions/types/generation_config.py b/google/genai/_interactions/types/generation_config.py
index 06b5f39b4..4972faba0 100644
--- a/google/genai/_interactions/types/generation_config.py
+++ b/google/genai/_interactions/types/generation_config.py
@@ -15,16 +15,19 @@
 
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
-from typing import List, Optional
-from typing_extensions import Literal
+from typing import List, Union, Optional
+from typing_extensions import Literal, TypeAlias
 
 from .._models import BaseModel
-from .tool_choice import ToolChoice
 from .image_config import ImageConfig
 from .speech_config import SpeechConfig
 from .thinking_level import ThinkingLevel
+from .tool_choice_type import ToolChoiceType
+from .tool_choice_config import ToolChoiceConfig
 
-__all__ = ["GenerationConfig"]
+__all__ = ["GenerationConfig", "ToolChoice"]
+
+ToolChoice: TypeAlias = Union[ToolChoiceType, ToolChoiceConfig]
 
 
 class GenerationConfig(BaseModel):
diff --git a/google/genai/_interactions/types/generation_config_param.py b/google/genai/_interactions/types/generation_config_param.py
index 58b145aef..a18ac8798 100644
--- a/google/genai/_interactions/types/generation_config_param.py
+++ b/google/genai/_interactions/types/generation_config_param.py
@@ -17,16 +17,19 @@
 
 from __future__ import annotations
 
-from typing import Iterable
-from typing_extensions import Literal, TypedDict
+from typing import Union, Iterable
+from typing_extensions import Literal, TypeAlias, TypedDict
 
 from .._types import SequenceNotStr
 from .thinking_level import ThinkingLevel
-from .tool_choice_param import ToolChoiceParam
+from .tool_choice_type import ToolChoiceType
 from .image_config_param import ImageConfigParam
 from .speech_config_param import SpeechConfigParam
+from .tool_choice_config_param import ToolChoiceConfigParam
 
-__all__ = ["GenerationConfigParam"]
+__all__ = ["GenerationConfigParam", "ToolChoice"]
+
+ToolChoice: TypeAlias = Union[ToolChoiceType, ToolChoiceConfigParam]
 
 
 class GenerationConfigParam(TypedDict, total=False):
@@ -56,7 +59,7 @@ class GenerationConfigParam(TypedDict, total=False):
     thinking_summaries: Literal["auto", "none"]
     """Whether to include thought summaries in the response."""
 
-    tool_choice: ToolChoiceParam
+    tool_choice: ToolChoice
     """The tool choice for the interaction."""
 
     top_p: float
diff --git a/google/genai/_interactions/types/tool_choice.py b/google/genai/_interactions/types/tool_choice.py
deleted file mode 100644
index 1fc68efe2..000000000
--- a/google/genai/_interactions/types/tool_choice.py
+++ /dev/null
@@ -1,26 +0,0 @@
-# Copyright 2025 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-# File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
-
-from typing import Union
-from typing_extensions import TypeAlias
-
-from .tool_choice_type import ToolChoiceType
-from .tool_choice_config import ToolChoiceConfig
-
-__all__ = ["ToolChoice"]
-
-ToolChoice: TypeAlias = Union[ToolChoiceType, ToolChoiceConfig]
diff --git a/google/genai/_interactions/types/tool_choice_param.py b/google/genai/_interactions/types/tool_choice_param.py
deleted file mode 100644
index 3cf39729c..000000000
--- a/google/genai/_interactions/types/tool_choice_param.py
+++ /dev/null
@@ -1,28 +0,0 @@
-# Copyright 2025 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-# File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
-
-from __future__ import annotations
-
-from typing import Union
-from typing_extensions import TypeAlias
-
-from .tool_choice_type import ToolChoiceType
-from .tool_choice_config_param import ToolChoiceConfigParam
-
-__all__ = ["ToolChoiceParam"]
-
-ToolChoiceParam: TypeAlias = Union[ToolChoiceType, ToolChoiceConfigParam]