diff --git a/libs/community/langchain_community/chat_models/javelin_ai_gateway.py b/libs/community/langchain_community/chat_models/javelin_ai_gateway.py
index 6c90103fae9..c45b034e493 100644
--- a/libs/community/langchain_community/chat_models/javelin_ai_gateway.py
+++ b/libs/community/langchain_community/chat_models/javelin_ai_gateway.py
@@ -18,7 +18,7 @@ from langchain_core.outputs import (
     ChatGeneration,
     ChatResult,
 )
-from langchain_core.pydantic_v1 import BaseModel, Extra, SecretStr
+from langchain_core.pydantic_v1 import BaseModel, Extra, Field, SecretStr
 
 logger = logging.getLogger(__name__)
 
@@ -65,9 +65,14 @@ class ChatJavelinAIGateway(BaseChatModel):
     client: Any
     """javelin client."""
 
-    javelin_api_key: Optional[SecretStr] = None
+    javelin_api_key: Optional[SecretStr] = Field(None, alias="api_key")
     """The API key for the Javelin AI Gateway."""
 
+    class Config:
+        """Configuration for this pydantic object."""
+
+        allow_population_by_field_name = True
+
     def __init__(self, **kwargs: Any):
         try:
             from javelin_sdk import (
diff --git a/libs/community/tests/unit_tests/chat_models/test_javelin_ai_gateway.py b/libs/community/tests/unit_tests/chat_models/test_javelin_ai_gateway.py
index 7c4500d340d..c612747dd5d 100644
--- a/libs/community/tests/unit_tests/chat_models/test_javelin_ai_gateway.py
+++ b/libs/community/tests/unit_tests/chat_models/test_javelin_ai_gateway.py
@@ -30,3 +30,17 @@ def test_api_key_masked_when_passed_via_constructor() -> None:
     assert str(llm.javelin_api_key) == "**********"
     assert "secret-api-key" not in repr(llm.javelin_api_key)
     assert "secret-api-key" not in repr(llm)
+
+
+@pytest.mark.requires("javelin_sdk")
+def test_api_key_alias() -> None:
+    for model in [
+        ChatJavelinAIGateway(
+            route="<javelin-ai-gateway-chat-route>",
+            javelin_api_key="secret-api-key",
+        ),
+        ChatJavelinAIGateway(
+            route="<javelin-ai-gateway-chat-route>", api_key="secret-api-key"
+        ),
+    ]:
+        assert str(model.javelin_api_key) == "**********"