diff --git a/libs/community/langchain_community/chat_models/perplexity.py b/libs/community/langchain_community/chat_models/perplexity.py
index ce415dd59cb..d168b1363e5 100644
--- a/libs/community/langchain_community/chat_models/perplexity.py
+++ b/libs/community/langchain_community/chat_models/perplexity.py
@@ -148,7 +148,6 @@ class ChatPerplexity(BaseChatModel):
     def _default_params(self) -> Dict[str, Any]:
         """Get the default parameters for calling PerplexityChat API."""
         return {
-            "request_timeout": self.request_timeout,
             "max_tokens": self.max_tokens,
             "stream": self.streaming,
             "temperature": self.temperature,
@@ -222,7 +221,7 @@ class ChatPerplexity(BaseChatModel):
         if stop:
             params["stop_sequences"] = stop
         stream_resp = self.client.chat.completions.create(
-            model=params["model"], messages=message_dicts, stream=True
+            messages=message_dicts, stream=True, **params
         )
         for chunk in stream_resp:
             if not isinstance(chunk, dict):
@@ -258,9 +257,7 @@ class ChatPerplexity(BaseChatModel):
                 return generate_from_stream(stream_iter)
         message_dicts, params = self._create_message_dicts(messages, stop)
         params = {**params, **kwargs}
-        response = self.client.chat.completions.create(
-            model=params["model"], messages=message_dicts
-        )
+        response = self.client.chat.completions.create(messages=message_dicts, **params)
         message = AIMessage(
             content=response.choices[0].message.content,
             additional_kwargs={"citations": response.citations},
@@ -271,8 +268,6 @@ class ChatPerplexity(BaseChatModel):
     def _invocation_params(self) -> Mapping[str, Any]:
         """Get the parameters used to invoke the model."""
         pplx_creds: Dict[str, Any] = {
-            "api_key": self.pplx_api_key,
-            "api_base": "https://api.perplexity.ai",
             "model": self.model,
         }
         return {**pplx_creds, **self._default_params}