Most developers reach for a Lambda function every time they need an LLM response, adding unnecessary complexity and latency. Step Functions can call Claude directly via the Bedrock SDK integration, turning a multi‑step AI workflow into a single, visual state machine. In this guide you’ll see how to build, run, and debug that workflow from Node.js 22.

Why Step Functions Makes AI Orchestration Simple

When you ask an LLM (large language model) to do something, the request is just the first step. Real‑world agents often need to

split a big problem into smaller prompts,

call the model many times in parallel,

combine the answers, and

store the result somewhere (for example, S3).

A naïve solution is to write a Lambda function that does all of this work. Each Lambda invocation adds a cold‑start delay, a separate IAM role, and a piece of code that you have to maintain.

Step Functions is a managed service that runs a state machine : a diagram of steps (states) that pass data from one to the next.…