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Invoke Your First Openai LLM Model Using Langchain






Prerequisite




# Update Ubuntu
sudo apt update
sudo apt upgrade -y

# Install Python
sudo apt install python3 python3-pip python3-venv -y

# Install langchain-openai
python3 -m pip install langchain-openai



Create Your First Program


from langchain_openai import ChatOpenAI

llm = ChatOpenAI(
    api_key="your_api_key",
    model="gpt-4.1-mini",
    temperature=0.6
)

text="what is the capital of india"

response = llm.invoke(text)

print(response.content)



Output


Picture showing the output of invoking the llm model in langchain





Posted By  -  Karan Gupta
 
Posted On  -  Monday, May 11, 2026

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