How to Use OkRouter with LangChain

Python Integration

Installation

pip install langchain langchain-openai

Basic Usage

from langchain_openai import ChatOpenAI

# Initialize OkRouter with LangChain
llm = ChatOpenAI(
    model="claude-3-5-sonnet-20241022",
    openai_api_key="sk-okr-your-api-key",
    openai_api_base="https://api.okrouter.com/v1",
    temperature=0.7
)

# Use it like any LangChain LLM
response = llm.invoke("Write a Python function to calculate fibonacci")
print(response.content)

With LangChain Chains

from langchain.chains import LLMChain
from langchain.prompts import PromptTemplate

# Create a prompt template
prompt = PromptTemplate(
    input_variables=["topic"],
    template="Write a blog post about {topic}"
)

# Create a chain
chain = LLMChain(llm=llm, prompt=prompt)

# Run the chain
result = chain.run(topic="AI development")
print(result)

JavaScript/TypeScript Integration

Installation

npm install langchain @langchain/openai

Basic Usage

import { ChatOpenAI } from "@langchain/openai";

// Initialize OkRouter with LangChain
const llm = new ChatOpenAI({
  modelName: "claude-3-5-sonnet-20241022",
  openAIApiKey: "sk-okr-your-api-key",
  configuration: {
    baseURL: "https://api.okrouter.com/v1",
  },
  temperature: 0.7,
});

// Use it
const response = await llm.invoke("Write a TypeScript function");
console.log(response.content);

Popular Models for LangChain