---
title: "How can I tell if an OpenAI model update changed my app’s answers?"  
description: "How can I tell if an OpenAI model update changed my app’s answers?"  
author: "Aashish Khadka"  
published: 2026-10-21  
updated: 2026-10-21  
canonical: https://www.mindstick.com/forum/162605/how-can-i-tell-if-an-openai-model-update-changed-my-app-s-answers  
category: "OpenAI API"  
tags: ["OpenAI", "api(s)", "testing"]  
reading_time: 1 minute  

---

# How can I tell if an OpenAI model update changed my app’s answers?

I use an OpenAI model through an API alias, and the same prompt sometimes seems to produce a noticeably different answer weeks later. I’m not sure whether that’s a model update, normal variation, or a change elsewhere in my app.

For anyone tracking this in production, what’s a practical way to catch meaningful behavior changes without treating every wording difference as a regression? I’m considering a small set of **fixed regression prompts**, but I’m unsure how often to run them or what to compare when model snapshot changes are involved.


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Original Source: https://www.mindstick.com/forum/162605/how-can-i-tell-if-an-openai-model-update-changed-my-app-s-answers

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