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How do high-resolution images affect the OpenAI API context window?

Ruslan Galiev 35 22 Oct 2026

I’m trying to estimate the context usage for a request that includes several images, not just text. If those images have very different dimensions, does the API treat them differently from a context-limit perspective?

I’m especially curious whether sending one high-resolution image can use noticeably more of the window than sending a few smaller images, and what developers should check when a request with images hits a context limit.


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