diff --git a/libs/partners/openai/langchain_openai/chat_models/base.py b/libs/partners/openai/langchain_openai/chat_models/base.py
index 6d41c83f331..41aecad78c1 100644
--- a/libs/partners/openai/langchain_openai/chat_models/base.py
+++ b/libs/partners/openai/langchain_openai/chat_models/base.py
@@ -477,7 +477,7 @@ def _handle_openai_bad_request(e: openai.BadRequestError) -> None:
 def _model_prefers_responses_api(model_name: str | None) -> bool:
     if not model_name:
         return False
-    return "gpt-5.2-pro" in model_name
+    return "gpt-5.2-pro" in model_name or "codex" in model_name
 
 
 _BM = TypeVar("_BM", bound=BaseModel)
diff --git a/libs/partners/openai/tests/unit_tests/chat_models/test_base.py b/libs/partners/openai/tests/unit_tests/chat_models/test_base.py
index 79fbc0222f8..886644c8a0c 100644
--- a/libs/partners/openai/tests/unit_tests/chat_models/test_base.py
+++ b/libs/partners/openai/tests/unit_tests/chat_models/test_base.py
@@ -3191,7 +3191,12 @@ def test_gpt_5_1_temperature_with_reasoning_effort_none(
 
 def test_model_prefers_responses_api() -> None:
     assert _model_prefers_responses_api("gpt-5.2-pro")
+    assert _model_prefers_responses_api("gpt-5.2-codex")
+    assert _model_prefers_responses_api("gpt-5.1-codex")
+    assert _model_prefers_responses_api("gpt-5.1-codex-max")
+    assert _model_prefers_responses_api("gpt-5-codex")
     assert not _model_prefers_responses_api("gpt-5.1")
+    assert not _model_prefers_responses_api("gpt-5")
 
 
 def test_openai_structured_output_refusal_handling_responses_api() -> None: