diff --git a/google/genai/_gaos/types/interactions/createagentinteraction.py b/google/genai/_gaos/types/interactions/createagentinteraction.py
index 8975bac10..f91c4cc43 100644
--- a/google/genai/_gaos/types/interactions/createagentinteraction.py
+++ b/google/genai/_gaos/types/interactions/createagentinteraction.py
@@ -151,7 +151,12 @@ class CreateAgentInteraction(BaseModel):
     tools: Optional[List[Tool]] = None
     r"""A list of tool declarations the model may call during interaction."""
 
-    response_modalities: Optional[List[ResponseModality]] = None
+    response_modalities: Annotated[
+        Optional[List[ResponseModality]],
+        pydantic.Field(
+            deprecated="warning: ** DEPRECATED ** - This will be removed in a future release, please migrate away from it as soon as possible."
+        ),
+    ] = None
     r"""The requested modalities of the response (TEXT, IMAGE, AUDIO)."""
 
     response_mime_type: Annotated[
diff --git a/google/genai/_gaos/types/interactions/createmodelinteraction.py b/google/genai/_gaos/types/interactions/createmodelinteraction.py
index 6732eb104..7d1efd340 100644
--- a/google/genai/_gaos/types/interactions/createmodelinteraction.py
+++ b/google/genai/_gaos/types/interactions/createmodelinteraction.py
@@ -121,7 +121,12 @@ class CreateModelInteraction(BaseModel):
     tools: Optional[List[Tool]] = None
     r"""A list of tool declarations the model may call during interaction."""
 
-    response_modalities: Optional[List[ResponseModality]] = None
+    response_modalities: Annotated[
+        Optional[List[ResponseModality]],
+        pydantic.Field(
+            deprecated="warning: ** DEPRECATED ** - This will be removed in a future release, please migrate away from it as soon as possible."
+        ),
+    ] = None
     r"""The requested modalities of the response (TEXT, IMAGE, AUDIO)."""
 
     response_mime_type: Annotated[
diff --git a/google/genai/_gaos/types/interactions/interaction.py b/google/genai/_gaos/types/interactions/interaction.py
index 64b34a6b9..24fecddc3 100644
--- a/google/genai/_gaos/types/interactions/interaction.py
+++ b/google/genai/_gaos/types/interactions/interaction.py
@@ -244,7 +244,12 @@ class Interaction(BaseModel):
     usage: Optional[Usage] = None
     r"""Statistics on the interaction request's token usage."""
 
-    response_modalities: Optional[List[ResponseModality]] = None
+    response_modalities: Annotated[
+        Optional[List[ResponseModality]],
+        pydantic.Field(
+            deprecated="warning: ** DEPRECATED ** - This will be removed in a future release, please migrate away from it as soon as possible."
+        ),
+    ] = None
     r"""The requested modalities of the response (TEXT, IMAGE, AUDIO)."""
 
     response_mime_type: Annotated[