ChatUpstage

This notebook covers how to get started with Upstage chat models.

Installation

Install langchain-upstage package.

pip install -U langchain-upstage

Environment Setup

Make sure to set the following environment variables:

• UPSTAGE_API_KEY: Your Upstage API key from Upstage console.

Usage

import os

os.environ["UPSTAGE_API_KEY"] = "YOUR_API_KEY"

from langchain_core.prompts import ChatPromptTemplate
from langchain_upstage import ChatUpstage

chat = ChatUpstage()

API Reference:ChatPromptTemplate | ChatUpstage

# using chat invoke
chat.invoke("Hello, how are you?")

# using chat stream
for m in chat.stream("Hello, how are you?"):
    print(m)

Chaining

# using chain
prompt = ChatPromptTemplate.from_messages(
    [
        ("system", "You are a helpful assistant that translates English to French."),
        ("human", "Translate this sentence from English to French. {english_text}."),
    ]
)
chain = prompt | chat

chain.invoke({"english_text": "Hello, how are you?"})

Related

• Chat model conceptual guide
• Chat model how-to guides