diff --git a/libs/langchain/langchain/llms/gooseai.py b/libs/langchain/langchain/llms/gooseai.py
index 831cff9a54ab0..30947ddb1b48f 100644
--- a/libs/langchain/langchain/llms/gooseai.py
+++ b/libs/langchain/langchain/llms/gooseai.py
@@ -1,14 +1,21 @@
 import logging
-from typing import Any, Dict, List, Mapping, Optional
+from typing import Any, Dict, List, Mapping, Optional, Union
 
 from langchain.callbacks.manager import CallbackManagerForLLMRun
 from langchain.llms.base import LLM
-from langchain.pydantic_v1 import Extra, Field, root_validator
+from langchain.pydantic_v1 import Extra, Field, SecretStr, root_validator
 from langchain.utils import get_from_dict_or_env
 
 logger = logging.getLogger(__name__)
 
 
+def _to_secret(value: Union[SecretStr, str]) -> SecretStr:
+    """Convert a string to a SecretStr if needed."""
+    if isinstance(value, SecretStr):
+        return value
+    return SecretStr(value)
+
+
 class GooseAI(LLM):
     """GooseAI large language models.
 
@@ -60,7 +67,7 @@ class GooseAI(LLM):
     logit_bias: Optional[Dict[str, float]] = Field(default_factory=dict)
     """Adjust the probability of specific tokens being generated."""
 
-    gooseai_api_key: Optional[str] = None
+    gooseai_api_key: Optional[SecretStr] = None
 
     class Config:
         """Configuration for this pydantic config."""
@@ -89,13 +96,14 @@ def build_extra(cls, values: Dict[str, Any]) -> Dict[str, Any]:
     @root_validator()
     def validate_environment(cls, values: Dict) -> Dict:
         """Validate that api key and python package exists in environment."""
-        gooseai_api_key = get_from_dict_or_env(
-            values, "gooseai_api_key", "GOOSEAI_API_KEY"
+        gooseai_api_key = _to_secret(
+            get_from_dict_or_env(values, "gooseai_api_key", "GOOSEAI_API_KEY")
         )
+        values["gooseai_api_key"] = gooseai_api_key
         try:
             import openai
 
-            openai.api_key = gooseai_api_key
+            openai.api_key = gooseai_api_key.get_secret_value()
             openai.api_base = "https://api.goose.ai/v1"
             values["client"] = openai.Completion
         except ImportError:
diff --git a/libs/langchain/tests/unit_tests/llms/test_gooseai.py b/libs/langchain/tests/unit_tests/llms/test_gooseai.py
new file mode 100644
index 0000000000000..db7a25ee9f92f
--- /dev/null
+++ b/libs/langchain/tests/unit_tests/llms/test_gooseai.py
@@ -0,0 +1,32 @@
+"""Test GooseAI"""
+
+import pytest
+from pytest import MonkeyPatch
+
+from langchain.llms.gooseai import GooseAI
+from langchain.pydantic_v1 import SecretStr
+
+
+@pytest.mark.requires("openai")
+def test_api_key_is_secret_string() -> None:
+    llm = GooseAI(gooseai_api_key="secret-api-key")
+    assert isinstance(llm.gooseai_api_key, SecretStr)
+    assert llm.gooseai_api_key.get_secret_value() == "secret-api-key"
+
+
+@pytest.mark.requires("openai")
+def test_api_key_masked_when_passed_via_constructor() -> None:
+    llm = GooseAI(gooseai_api_key="secret-api-key")
+    assert str(llm.gooseai_api_key) == "**********"
+    assert "secret-api-key" not in repr(llm.gooseai_api_key)
+    assert "secret-api-key" not in repr(llm)
+
+
+@pytest.mark.requires("openai")
+def test_api_key_masked_when_passed_from_env() -> None:
+    with MonkeyPatch.context() as mp:
+        mp.setenv("GOOSEAI_API_KEY", "secret-api-key")
+        llm = GooseAI()
+        assert str(llm.gooseai_api_key) == "**********"
+        assert "secret-api-key" not in repr(llm.gooseai_api_key)
+        assert "secret-api-key" not in repr(llm)