diff --git a/src/openai/types/responses/response.py b/src/openai/types/responses/response.py
index ada0783bce..227cc39d6b 100644
--- a/src/openai/types/responses/response.py
+++ b/src/openai/types/responses/response.py
@@ -315,7 +315,7 @@ def output_text(self) -> str:
         for output in self.output:
             if output.type == "message":
                 for content in output.content:
-                    if content.type == "output_text":
-                        texts.append(content.text)
+                    if content.text != None:
+                          texts.append(content.text)
 
         return "".join(texts)
diff --git a/src/openai/types/responses/response_output_text.py b/src/openai/types/responses/response_output_text.py
index 2386fcb3c0..6e78685fdc 100644
--- a/src/openai/types/responses/response_output_text.py
+++ b/src/openai/types/responses/response_output_text.py
@@ -122,7 +122,7 @@ class ResponseOutputText(BaseModel):
     annotations: List[Annotation]
     """The annotations of the text output."""
 
-    text: str
+    text: Optional[str]:
     """The text output from the model."""
 
     type: Literal["output_text"]
diff --git a/tests/lib/responses/test_responses.py b/tests/lib/responses/test_responses.py
index 8e5f16df95..36fbafda16 100644
--- a/tests/lib/responses/test_responses.py
+++ b/tests/lib/responses/test_responses.py
@@ -8,6 +8,7 @@
 
 from openai import OpenAI, AsyncOpenAI
 from openai._utils import assert_signatures_in_sync
+from openai.types.responses.response import Response
 
 from ...conftest import base_url
 from ..snapshots import make_snapshot_request
@@ -41,6 +42,76 @@ def test_output_text(client: OpenAI, respx_mock: MockRouter) -> None:
     )
 
 
+def test_output_text_with_null_text_field() -> None:
+    """Regression test for https://github.com/openai/openai-python/issues/3063.
+
+    The API can return output_text items with text: null. model_validate should
+    not raise, and output_text should skip null entries rather than failing.
+    """
+    data = {
+        "id": "resp_null_output_text",
+        "object": "response",
+        "created_at": 0,
+        "status": "completed",
+        "background": False,
+        "error": None,
+        "incomplete_details": None,
+        "instructions": None,
+        "max_output_tokens": None,
+        "max_tool_calls": None,
+        "model": "gpt-4o-mini",
+        "output": [
+            {
+                "id": "msg_null_output_text",
+                "type": "message",
+                "status": "completed",
+                "role": "assistant",
+                "content": [
+                    {
+                        "type": "output_text",
+                        "annotations": [],
+                        "logprobs": [],
+                        "text": None,
+                    },
+                    {
+                        "type": "output_text",
+                        "annotations": [],
+                        "logprobs": [],
+                        "text": '{"message":"hello"}',
+                    },
+                ],
+            }
+        ],
+        "parallel_tool_calls": True,
+        "previous_response_id": None,
+        "prompt_cache_key": None,
+        "reasoning": {"effort": None, "summary": None},
+        "safety_identifier": None,
+        "service_tier": "default",
+        "store": True,
+        "temperature": 1.0,
+        "text": {"format": {"type": "text"}, "verbosity": "medium"},
+        "tool_choice": "auto",
+        "tools": [],
+        "top_logprobs": 0,
+        "top_p": 1.0,
+        "truncation": "disabled",
+        "usage": {
+            "input_tokens": 1,
+            "input_tokens_details": {"cached_tokens": 0},
+            "output_tokens": 1,
+            "output_tokens_details": {"reasoning_tokens": 0},
+            "total_tokens": 2,
+        },
+        "user": None,
+        "metadata": {},
+    }
+
+    response = Response.model_validate(data)
+
+    assert response.output_text == '{"message":"hello"}'
+
+
 @pytest.mark.parametrize("sync", [True, False], ids=["sync", "async"])
 def test_stream_method_definition_in_sync(sync: bool, client: OpenAI, async_client: AsyncOpenAI) -> None:
     checking_client: OpenAI | AsyncOpenAI = client if sync else async_client