---
title: "Does OpenAI vision resize every image before analysis?"  
description: "Does OpenAI vision resize every image before analysis?"  
author: "Saurabh Verma"  
published: 2026-10-21  
updated: 2026-10-21  
canonical: https://www.mindstick.com/forum/162690/does-openai-vision-resize-every-image-before-analysis  
category: "Vision API"  
tags: ["OpenAI", "computer vision", "api(s)"]  
reading_time: 1 minute  

---

# Does OpenAI vision resize every image before analysis?

I’m testing image questions through the OpenAI API and can’t tell how much control I have over the image the model actually sees. If I send a large screenshot or a detailed diagram, is it analyzed at its original resolution, or does the API resize or split it first?

I’m especially curious about the difference between the default setting and **high-detail image input**. Has anyone compared the results on small text, dense charts, or UI screenshots? I’d like to know whether choosing a detail level changes what the model can reliably read, or mainly affects token use.


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Original Source: https://www.mindstick.com/forum/162690/does-openai-vision-resize-every-image-before-analysis

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