n8n Node Guide: LLM Chain

Description

AI & LangChain node in n8n.

What It Does

A deterministic LLM pipeline: prompt in, answer out.

When To Use It

Fixed transformations: summarization, classification, extraction with known steps.

Key Parameters

Prompt (with {{ }} variables), Model, Output Parser

Common Mistakes

No tools, no memory – it is a single LLM call. Add nodes around it for logic.

Example

LLM Chain: “Summarize this article: {{ $json.text }}” -> summary.

FAQ

Is this node included in n8n Community Edition?

Yes – LLM Chain ships with the free Community Edition. No paid license needed.

Cheaper and more predictable than an agent for fixed tasks.?

Where does it fit in a workflow?

LLM Chain works with any other node – connect it after a trigger or data node, and feed its output into the next step. Standard n8n data flow: trigger -> transform -> act.

Is support included?

Yes – message the seller through the store and I will help you wire this node.