Basic Chatmodels - Official Doc

Build a python project environment

• Install anaconda
• Create an environment
• create a Project folder
• Follow along this tutorial to save your api-keys

Simple LLM Application

Read and work along this langchain tutorial:

https://python.langchain.com/docs/tutorials/llm_chain/

Make a note of major learnings.

Exercise: Execute the code in this doc in your own device

Execute the code in this doc in your own device. 

Question: multiple ways of calling a model

Are the following model calls equivalent? 

model.invoke("Hello")

model.invoke([{"role": "user", "content": "Hello"}])

model.invoke([HumanMessage("Hello")])

How can you verify your guess?

Question: Invoke vs streaming?

What is the difference between? 

model.invoke("hi")

and

model.stream("hi")

Exercise: Check Model's IQ

• Ask a model to generate a question to check someone's IQ. 
• Ask that same question to a different model.

Ans notebook:

https://github.com/krajit/MAT496-Monsoon2025/blob/main/mod01_langchain_basics/nb01a_models_IQ_testing.ipynb