🎓 Learn evaluate tool. Tutorial for beginners with Gemini and Google Sheets
Ready for 3.0Ready for 3.0. This template uses no nodes that n8n 3.0 removes. No removed nodes, versions or helpers found. Static check, last run 2026-10-19.
What this workflow does
This AI workflow has 14 nodes and runs on Evaluation events (plus 1 other trigger). Along the way it connects Evaluation and Google Gemini Chat Model.
How it runs
Trigger: On Evaluation events (plus 1 other trigger).
- Get input (Edit Fields (Set)): sets 1 field: text
- Get manual input (Edit Fields (Set)): sets 1 field: text
- AI Agent: runs an AI agent, with model: Google Gemini Chat Model; 1 tool (Calculator)
- Evaluation: check if evaluating
- Get output (Edit Fields (Set)): sets 1 field: output
- Set output Evaluation (Evaluation): uses Evaluation
- Corectness (Evaluation): set metrics, with model: Google Gemini Chat Model
- Set correctness (Evaluation): uses Evaluation
Services it uses
Before you upgrade to n8n 3.0
Nothing in this workflow is removed in n8n 3.0, so it should import and run after the upgrade.
Nodes used (8)
- Evaluation Trigger
n8n-nodes-base.evaluationTrigger - AI Agent
@n8n/n8n-nodes-langchain.agent - Calculator
@n8n/n8n-nodes-langchain.toolCalculator - Google Gemini Chat Model
@n8n/n8n-nodes-langchain.lmChatGoogleGemini - Manual Trigger
n8n-nodes-base.manualTrigger - Evaluation
n8n-nodes-base.evaluation - No Operation, do nothing
n8n-nodes-base.noOp - Edit Fields (Set)
n8n-nodes-base.set
From the author
This workflow is a beginner-friendly tutorial demonstrating how to use the Evaluation tool to automatically score the AI’s output against a known correct answer (“ground truth”) stored in a Google Sheet. --- Advantages ✅ Beginner-friendly – Provides a simple…