Vertex AI SDK Comparison

This project compares Google Vertex AI SDK with LangChain's Vertex SDK using TypeScript and ES modules.

Setup

1. Install dependencies:

npm install

2. Create a .env file in the root directory with your API keys:

GOOGLE_API_KEY=your-google-api-key-here
GOOGLE_LANGCHAIN_API_KEY=your-google-langchain-api-key-here

Both API keys are required.

3. Add your prompts (optional):
   • Edit system-instructions.md with your system instructions
   • Edit user-input.md with your user input/prompt

Running Tests

Run the test suite with Vitest:

npm test

Or run the test file directly:

npx vitest src/index.test.ts

The tests will:

• Run both SDK calls in parallel
• Save results to results/genai.json and results/langchain.json
• Check that the duration difference is within 8 seconds