Update app.py

app.py

@@ -83,21 +83,7 @@ retriever = PineconeHybridSearchRetriever(
     alpha=0.5,
 )
 
-
-from langchain_huggingface import HuggingFaceEndpoint, ChatHuggingFace
-
-llm = HuggingFaceEndpoint(
-    repo_id="meta-llama/Llama-3.1-70B-Instruct",
-    task="text-generation",
-    max_new_tokens=512,
-    do_sample=False,
-    repetition_penalty=1.03,
-    huggingfacehub_api_token=HUGGINGFACE_TOKEN
-)
-
-llm = ChatHuggingFace(llm=llm, verbose=True)
-
-
+llm = ChatPerplexity(temperature=0, pplx_api_key=GROQ_API_KEY, model="llama-3.1-sonar-large-128k-chat", max_tokens=512, max_retries=2)
 
 
 # Initialize LLM