OpenAI with LangChain

Use LangChain to integrate OpenAI with Helicone to log your OpenAI usage.

1. Create an account and generate an API key

   Log into Helicone or create an account. Once you have an account, you can generate an API key here.
2. Set up your Helicone API key in your .env file

   HELICONE_API_KEY=<your-helicone-api-key>
   OPENAI_API_KEY=<your-openai-api-key>
   

3. Modify the base URL path and set up authentication

   javascript

   import { OpenAI } from "@langchain/openai";
   
   const llm = new OpenAI({
     apiKey: process.env.OPENAI_API_KEY,
     baseURL: "https://oai.helicone.ai/v1",
     defaultHeaders: {
       "Helicone-Auth": `Bearer ${process.env.HELICONE_API_KEY}`
     }
   });
   

4. Use the LangChain SDK

   javascript

   const response = await llm.invoke("What is the meaning of life?");
   console.log(response);
   

5. Verify your requests in Helicone

   With the above setup, any calls to OpenAI will automatically be logged and monitored by Helicone. Review them in your Helicone dashboard.