app.py

from langchain.chat_models import ChatOpenAI
from langchain.schema import HumanMessage
from dotenv import load_dotenv
import streamlit as st
import os

load_dotenv()


#function to load openAI model and get response

def get_model_response(question):
    llm=ChatOpenAI(
        base_url = "https://openrouter.ai/api/v1",
        openai_api_key = os.getenv("OPENROUTE_API_KEY"),
        model= "deepseek/deepseek-r1-zero:free",
        temperature=0.4
    )
    response = llm.invoke([HumanMessage(content=question)])
    return response

st.set_page_config(page_title="Chat With your love ❤️")

st.header("Langchain Application")

input = st.text_input("Input: ", key=input)
response = get_model_response(input)
submit = st.button("Ask")

if submit:
    st.subheader("the Response is: ")
    st.write(response.content)