Open Source · framework

Use InternLM 2.5 20B with LangChain

Updated 2026-05-21 · By XALEN

How to use InternLM 2.5 20B (Open Source, 20B) with LangChain. Install, authenticate, and make your first API call in minutes. Working code example included.

Model

InternLM 2.5 20B

20B · 256K context · $0.02 input

Framework

LangChain

framework · pip install langchain-openai

1. Install

pip install langchain-openai

2. Code

from langchain_openai import ChatOpenAI

llm = ChatOpenAI(
    model="internlm-2-5-20b",
    openai_api_key="xln_test_YOUR_KEY",
    openai_api_base="https://api.xalen.io/v1"
)

response = llm.invoke("What is InternLM 2.5 20B?")
print(response.content)

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Last updated: 2026-05-21