LangChain Ruby Example

A sample Ruby script that uses LangChain to talk to LLMs.

You’ll need an API key for each LLM. So just follow the instructions linked below to obtain your API keys.

• OpenAI ChatGPT
• Anthropic Claude
• Google Gemini

Save the keys to the app/src/main/resources/.env file as the corresponding ..._API_KEY environment variable. You can use app/src/main/resources/.env.template as a guide to structure your .env file.

Install packages, if you haven't already.

bundle

To Run

To run against OpenAI's ChatGPT:

bundle exec ruby hello.rb --model openai

To run against Anthropic's Claude:

bundle exec ruby hello.rb --model anthropic

To run against Google's Gemini:

bundle exec ruby hello.rb --model google

If you don't specify --model, it will default to openai and use ChatGPT.