# Evaluate AI response accuracy using cosine similarity of embeddings in Google Sheets
This workflow automates the evaluation of AI-generated responses by comparing them to ground truth answers using cosine similarity of OpenAI embeddings. Designed for developers, ML engineers, and analytics teams who need reliable metrics to assess model accuracy, consistency, and performance over time.
## Who it´s for
- AI developers testing model precision
- ML engineers evaluating LLM consistency
- Teams building RAG systems requiring quality metrics
- Analysts tracking chatbot performance against benchmark data
## What the automation does
- Triggers on new row in Google Sheets or manual execution
- Fetches question, ground truth answer, and AI-generated response
- Generates embeddings via OpenAI API for both answers
- Computes cosine similarity score as accuracy metric
- Writes result back to Google Sheets for tracking
- Enables regression testing after model updates
## What´s included
- Ready-to-use n8n workflow with LangChain agent logic
- Trigger and handler logic based on Google Sheets
- Integrations with Google Sheets, OpenAI, and Embeddings API
- Basic text guide for setup and adaptation
## Requirements for setup
- n8n account (cloud or self-hosted)
- Access to Google Sheet with test cases (questions, ground truth, AI responses)
- OpenAI API key
- Installed Google Sheets and HTTP nodes in n8n
## Benefits and outcomes
- Objective, automated scoring of AI response quality
- Track model improvements or regressions over time
- Reduce manual review effort in testing cycles
- Centralized results storage for trend analysis
- Scalable testing across multiple use cases
- Easy addition of new test scenarios via spreadsheet
## Important: template only
Important: you are purchasing a ready-made automation workflow template only. Rollout into your infrastructure, connecting specific accounts and services, 1:1 setup help, custom adjustments for non-standard stacks and any consulting support are provided as a separate paid service at an individual rate. To discuss custom work or 1:1 help, contact via chat
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