---
title: "How can I tell whether an OpenAI model update changed my results?"  
description: "How can I tell whether an OpenAI model update changed my results?"  
author: "Jithin Menon"  
published: 2026-10-15  
updated: 2026-10-15  
canonical: https://www.mindstick.com/forum/162414/how-can-i-tell-whether-an-openai-model-update-changed-my-results  
category: "OpenAI Models"  
tags: ["OpenAI", "LLM testing", "Model updates"]  
reading_time: 1 minute  

---

# How can I tell whether an OpenAI model update changed my results?

I have a few prompts that behave reliably in production, but I’m concerned that a model update could change their output even if I haven’t touched the prompts. What’s a practical way to compare the new behavior with the version I’m using now?

I’m especially interested in **model snapshot comparison**: do you keep a fixed test set and score outputs automatically, or review a sample by hand? If you’ve caught a subtle regression this way, what did you measure besides exact wording?


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Original Source: https://www.mindstick.com/forum/162414/how-can-i-tell-whether-an-openai-model-update-changed-my-results

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