"langchain": "^0.1.2", Cannot find module 'langchain/llms',

[zwilch]

node -v v20.10.0
npm -v 10.2.5

followed this simple tutorial: https://langchainers.hashnode.dev/getting-started-with-langchainjs

Error:

Cannot find module 'langchain/llms' or its corresponding type declarations.
1 import { OpenAI } from 'langchain/llms'

package.json

{
  "name": "",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "type": "module",
  "license": "AGPL-version-3.0",
  "private": false,
  "engines": {
    "node": ">= 20.10.0",
    "npm": ">= 10.2.5"
  },
  "homepage": "",
  "repository": {
    "type": "git",
    "url": ""
  },
  "bugs": "",
  "keywords": [],
  "author": {
    "name": "",
    "email": "",
    "url": ""
  },
  "contributors": [],
  "scripts": {
    "build": "tsc",
    "start": "node ./dist/app.js",
    "dev": "ts-node --esm ./src/app.ts"
  },
  "dependencies": {
    "@types/node": "^20.11.1",
    "dotenv": "^16.3.1",
    "langchain": "^0.1.2",
    "openai": "^4.24.7",
    "typescript": "^5.3.3"
  },
  "devDependencies": {
    "ts-node": "^10.9.2"
  }
}

[dosubot]

🤖

Hello @zwilch! I'm Dosu, your friendly bot here to assist you with bug troubleshooting, answering questions, and guiding you on becoming a fantastic contributor while we're waiting for a human maintainer. I'm ready to help you out with your langchainjs issue. Let's dive into it together!

Based on the context provided, it seems like you're encountering an issue with importing the OpenAI module from langchain/llms in your project using langchain version 0.1.2. This issue has been reported before in the langchainjs repository, specifically in the issues: Issue importing submodules using es6 module import from documentation, ECMAScript module cannot be used in CommonJS module, Cannot find module 'langchain/tools/google_calendar', and importing issues..

The error message "Cannot find module 'langchain/llms' or its corresponding type declarations" indicates that the module 'langchain/llms' cannot be found in your project. This could be due to a few reasons:

1. The module 'langchain/llms' does not exist in the version of langchainjs you are using. It's possible that the 'llms' module was introduced in a later version.
2. The module 'langchain/llms' is not correctly installed in your project. This could be due to an incorrect installation or a problem with your node_modules folder.
3. The import path is incorrect. In your case, you are trying to import { OpenAI } from 'langchain/llms'. However, in the example code you provided, the import statement is 'langchain/llms/openai'. This could be the source of the problem.

To fix this issue, you should:

1. Check the version of langchainjs you are using and make sure it includes the 'llms' module. If it doesn't, you may need to upgrade to a later version.
2. Make sure the 'langchain/llms' module is correctly installed in your project. You can do this by checking your node_modules folder or by reinstalling the module.
3. Correct the import path in your code. Based on the example code you provided, the correct import statement should be 'langchain/llms/openai', not 'langchain/llms'. So, your import statement should look like this:

import { OpenAI } from "langchain/llms/openai";

If you've done all of these steps and are still encountering the error, there may be a deeper issue with your project configuration or with the langchainjs library itself.

As for the exact structure of the 'langchain/llms' module in the langchainjs version 0.1.2, I wasn't able to find an answer within the repository. The answer may be available elsewhere or I could have missed it.

I hope this helps! If you have any other questions or need further clarification, feel free to ask.

-Dosu

Sources

• Issue importing submodules using es6 module import from documentation
• examples/src/llms/openai.ts

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[zwilch]

Thank you, this
import { OpenAI } from "langchain/llms/openai";
solved the problem.

[jacoblee93]

Glad Dosu solved it, @langchain/openai is the preferred entrypoint now though via the partner package.