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Why does writing one alt text sentence per image take forever?
What you'll have at the end
Every image in the folder carries a specific, checkable alt attribute: a real sentence for anything that shows content, an empty attribute for anything purely decorative, and never the bare word 'image'.
You need
A folder of image files already sitting in a project or docs site, each one either missing an alt attribute or carrying a placeholder, plus a vision-capable model you can already call from a script.
Not covered
Generating alt text for charts and graphs, where the reader needs the underlying numbers pulled out instead of a description of what the chart shows.
Cut a vision call's token cost by resizing images first
when the folder holds hundreds of large photos and the vision bill from sending every one gets big
A vision model gets the chart's arithmetic confidently wrong
when the images are charts or graphs and the alt text needs to carry the actual numbers the chart shows, which a plain description leaves out
Checked 15 Aug 2026
Part of the Multimodal AI cookbook