diff --git a/src/openai/types/beta/beta_response_output_message_param.py b/src/openai/types/beta/beta_response_output_message_param.py
index 0ac8a9c60e..9b89293bea 100644
--- a/src/openai/types/beta/beta_response_output_message_param.py
+++ b/src/openai/types/beta/beta_response_output_message_param.py
@@ -23,7 +23,7 @@ class Agent(TypedDict, total=False):
 class BetaResponseOutputMessageParam(TypedDict, total=False):
     """An output message from the model."""
 
-    id: Required[str]
+    id: str
     """The unique ID of the output message."""
 
     content: Required[Iterable[Content]]
@@ -32,7 +32,7 @@ class BetaResponseOutputMessageParam(TypedDict, total=False):
     role: Required[Literal["assistant"]]
     """The role of the output message. Always `assistant`."""
 
-    status: Required[Literal["in_progress", "completed", "incomplete"]]
+    status: Literal["in_progress", "completed", "incomplete"]
     """The status of the message input.
 
     One of `in_progress`, `completed`, or `incomplete`. Populated when input items
diff --git a/src/openai/types/responses/response_output_message_param.py b/src/openai/types/responses/response_output_message_param.py
index 4552d9bf1f..202c6bd03d 100644
--- a/src/openai/types/responses/response_output_message_param.py
+++ b/src/openai/types/responses/response_output_message_param.py
@@ -16,7 +16,7 @@
 class ResponseOutputMessageParam(TypedDict, total=False):
     """An output message from the model."""
 
-    id: Required[str]
+    id: str
     """The unique ID of the output message."""
 
     content: Required[Iterable[Content]]
@@ -25,7 +25,7 @@ class ResponseOutputMessageParam(TypedDict, total=False):
     role: Required[Literal["assistant"]]
     """The role of the output message. Always `assistant`."""
 
-    status: Required[Literal["in_progress", "completed", "incomplete"]]
+    status: Literal["in_progress", "completed", "incomplete"]
     """The status of the message input.
 
     One of `in_progress`, `completed`, or `incomplete`. Populated when input items
diff --git a/tests/test_response_output_message_param.py b/tests/test_response_output_message_param.py
new file mode 100644
index 0000000000..cde45d868a
--- /dev/null
+++ b/tests/test_response_output_message_param.py
@@ -0,0 +1,86 @@
+from __future__ import annotations
+
+from typing_extensions import assert_type
+
+from openai.types.beta import BetaResponseInputParam
+from openai.types.responses import ResponseInputParam
+from openai.types.beta.beta_response_output_message_param import BetaResponseOutputMessageParam
+from openai.types.responses.response_output_message_param import ResponseOutputMessageParam
+
+
+def test_response_output_message_param_id_and_status_are_optional() -> None:
+    # Client-authored assistant message turn without invented id or status
+    message: ResponseOutputMessageParam = {
+        "type": "message",
+        "role": "assistant",
+        "content": [
+            {
+                "type": "output_text",
+                "text": "5",
+                "annotations": [],
+            },
+            {
+                "type": "output_text",
+                "text": "something else?",
+                "annotations": [],
+            },
+        ],
+    }
+
+    assert_type(message, ResponseOutputMessageParam)
+    assert "id" not in message
+    assert "status" not in message
+
+    # Fully valid within ResponseInputParam list
+    conversation: ResponseInputParam = [
+        {"role": "user", "content": [{"type": "input_text", "text": "2+3=?"}]},
+        message,
+        {"role": "user", "content": [{"type": "input_text", "text": "what's the square of the result?"}]},
+    ]
+    assert len(conversation) == 3
+
+
+def test_response_output_message_param_with_id_and_status() -> None:
+    # Optional id and status are still accepted when provided
+    message: ResponseOutputMessageParam = {
+        "type": "message",
+        "id": "msg_123",
+        "status": "completed",
+        "role": "assistant",
+        "content": [
+            {
+                "type": "output_text",
+                "text": "hello",
+                "annotations": [],
+            }
+        ],
+    }
+
+    assert_type(message, ResponseOutputMessageParam)
+    assert message["id"] == "msg_123"
+    assert message["status"] == "completed"
+
+
+def test_beta_response_output_message_param_id_and_status_are_optional() -> None:
+    # Client-authored assistant message turn without invented id or status
+    message: BetaResponseOutputMessageParam = {
+        "type": "message",
+        "role": "assistant",
+        "content": [
+            {
+                "type": "output_text",
+                "text": "5",
+                "annotations": [],
+            },
+        ],
+    }
+
+    assert_type(message, BetaResponseOutputMessageParam)
+    assert "id" not in message
+    assert "status" not in message
+
+    conversation: BetaResponseInputParam = [
+        {"role": "user", "content": [{"type": "input_text", "text": "hello"}]},
+        message,
+    ]
+    assert len(conversation) == 2