diff --git a/libs/community/langchain_community/embeddings/gpt4all.py b/libs/community/langchain_community/embeddings/gpt4all.py
index 87c0bdca4bf..1c6b6501898 100644
--- a/libs/community/langchain_community/embeddings/gpt4all.py
+++ b/libs/community/langchain_community/embeddings/gpt4all.py
@@ -22,21 +22,20 @@ class GPT4AllEmbeddings(BaseModel, Embeddings):
             )
     """
 
-    model_name: str
+    model_name: Optional[str] = None
     n_threads: Optional[int] = None
     device: Optional[str] = "cpu"
     gpt4all_kwargs: Optional[dict] = {}
     client: Any  #: :meta private:
 
-    @root_validator()
+    @root_validator(pre=True)
     def validate_environment(cls, values: Dict) -> Dict:
         """Validate that GPT4All library is installed."""
-
         try:
             from gpt4all import Embed4All
 
             values["client"] = Embed4All(
-                model_name=values["model_name"],
+                model_name=values.get("model_name"),
                 n_threads=values.get("n_threads"),
                 device=values.get("device"),
                 **values.get("gpt4all_kwargs"),