# How to use Vertex AI Prompt Optimizer with ground truth data

DevFeed: [How to use Vertex AI Prompt Optimizer with ground truth data](<https://devfeed.tech/articles/boost-accuracy-with-the-prompt-optimizer-16647.md>)

Original publisher: [Read original article](<https://firebase.blog/posts/2026/01/boost-accuracy-with-the-prompt-optimizer>)

Author: Alexander Nohe; Elena Erbiceanu Tener

Published: 2026-01-20T00:00:00Z

Content type: tutorial

Language: en

Sources: [Firebase Blog](<https://devfeed.tech/sources/firebase-blog.md>)

Topics: [Prompt Engineering](<https://devfeed.tech/topics/prompt-engineering.md>), [Artificial Intelligence](<https://devfeed.tech/topics/ai.md>), [Ground truth / benchmark quality](<https://devfeed.tech/topics/ground-truth-benchmark-quality.md>), [Google](<https://devfeed.tech/topics/google.md>), [CSV](<https://devfeed.tech/topics/csv.md>), [data](<https://devfeed.tech/topics/data.md>), [Firebase](<https://devfeed.tech/topics/firebase.md>)

Tags: [ai](<https://devfeed.tech/tags/ai.md>), [cloud-storage](<https://devfeed.tech/tags/cloud-storage.md>), [data](<https://devfeed.tech/tags/data.md>), [evaluation](<https://devfeed.tech/tags/evaluation.md>), [firebase](<https://devfeed.tech/tags/firebase.md>), [format](<https://devfeed.tech/tags/format.md>), [gemini](<https://devfeed.tech/tags/gemini.md>), [google](<https://devfeed.tech/tags/google.md>), [google-cloud](<https://devfeed.tech/tags/google-cloud.md>), [how-to](<https://devfeed.tech/tags/how-to.md>), [learn](<https://devfeed.tech/tags/learn.md>), [quality](<https://devfeed.tech/tags/quality.md>), [vertex](<https://devfeed.tech/tags/vertex.md>), [vertex-ai](<https://devfeed.tech/tags/vertex-ai.md>)

## AI overview

This tutorial explains how to use Vertex AI Prompt Optimizer with ground truth data to iteratively tune prompts and evaluate output quality. It describes preparing scripts and target descriptions in a Google Sheet, exporting the data as CSV, uploading it to Google Cloud Storage, and configuring optimization in a Colab Enterprise notebook.

## Source excerpt

Learn how to use the Vertex AI Prompt Optimizer to automatically tune your prompts to get better results by iterating on your prompts and then running an evaluation on the outputs assessing their quality to see if it has improved.