

DDG’s description of that feature:
If you don’t want AI-generated images to show up in DuckDuckGo image search results, you can filter them out a few different ways:
- Anytime you’re viewing image search results in the Images tab on DuckDuckGo search, you can click the AI images filter and select Hide to reload results without AI-generated content.
- Alternatively, open Search Settings > General or Search Settings > AI Features and turn on Hide AI-Generated Images.
- Finally, if you want a search experience without AI-generated images, without Search Assist answers, and without Duck.ai prompts and entry points, start your searches on noai.duckduckgo.com instead of duckduckgo.com.
How does DuckDuckGo filter out AI-generated images in search results?
We rely on publicly available lists to filter out AI-generated content, like those provided by uBlockOrigin & uBlacklist Huge AI Blocklist, an open-source blocklist, manually curated by project contributors.
These lists are not exhaustive, but our aim with the “AI images” filter is to filter out as much AI-generated content as possible.
I run Firefox on Linux Mint with uBlockOrigin and uMatrix addons (with modified settings) so I can’t speak to the universality of my results, but it seems like DDG is pretty loose with how it categorizes and displays info.
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With AI images set to hide on first search for “morse code chart” I get the following: Hide
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Toggling the AI image setting to show instantly changes the results and displays these: Show (instant)
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Without additional changes, just clicking the search button again slightly changes the results: show (re-search)
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Toggling the AI image setting back to hide again instantly changes the results to: Hide (instant)
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Re-running the search as is returns the same results as #1.
I’ve also previously had horrible luck getting the date filters to work when trying to use a bookmarklet style shortcut to add the dates as parameters in the address bar (they’re just completely ignored when a search is run that way for me), and as of ~2 days ago the date range just didn’t seem to work at all. I was trying to find a human authored post/article about the difference between opossums and possums and using a date range of 1950–2015 was still ONLY returning results post-2023 and they were all wordy slop.
I don’t know offhand but I strongly suspect everything related to AI is defaulted to on/show.