try mistral model

app/chains.py

@@ -14,10 +14,12 @@ load_dotenv()
 
 # data_indexer = DataIndexer()
 
-tokenizer = AutoTokenizer.from_pretrained("meta-llama/Meta-Llama-3-8B-Instruct")
+MODEL_ID = "mistralai/Mistral-7B-Instruct-v0.3"
+
+tokenizer = AutoTokenizer.from_pretrained(MODEL_ID)
 
 llm = HuggingFaceEndpoint(
-    model="meta-llama/Meta-Llama-3-8B-Instruct",
+    model=MODEL_ID,
     huggingfacehub_api_token=os.environ['HF_TOKEN'],
     max_new_tokens=512,
     stop_sequences=[tokenizer.eos_token],