Set Environment Variables

Environment Variables in BAML

Sometimes you’ll see environment variables used in BAML, like in clients:

1 client<llm> GPT4o {
2   provider baml-openai-chat
3   options {
4     model gpt-4o
5     api_key env.OPENAI_API_KEY
6   }
7 }

To set environment variables:

In the VSCode Playground

For your app (default)

For your app (manually)

Dynamically setting LLM API Keys

You can set the API key for an LLM dynamically by passing in the key as a header or as a parameter (depending on the provider), using the ClientRegistry.

1	client<llm> GPT4o {
2	provider baml-openai-chat
3	options {
4	model gpt-4o
5	api_key env.OPENAI_API_KEY
6	}
7	}