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Alexios Mantzarlis

@mantzarlis.com
3.7K followers 1.3K following 2.6K posts

Tech, facts, and carbonara. mantzarlis.com

PostsRepliesMedia
Alexios Mantzarlis @mantzarlis.com · 15h
Grokipedia is back! But I would still avoid using it to prepare for trivia night. From this week’s free @indicator.media briefing: indicator.media/p/briefing-g...
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Alexios Mantzarlis @mantzarlis.com · 30/09/2026
These sites know what they are doing. Here's one of them that put the domain name for the UK government inside its own ad headline. You can certainly see how people might believe it to be the official website, what with its favorable placement too
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Alexios Mantzarlis @mantzarlis.com · 30/09/2026
These sites would suffer greatly if Google refused their money. Ten of the 16 I reviewed got 50% or more of their traffic from paid search, with six of these relying on it for 75% or more of their visits.
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Alexios Mantzarlis @mantzarlis.com · 30/09/2026
Unofficial providers of visas are flooding Google with thousands of ads and charging 2x to 30x the normal price for travel authorization to Australia, Canada, Egypt, India, Indonesia, New Zealand, Thailand, UK, & US. Only 8% of these ads carry the mandated "Not a government website" disclosure.
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Alexios Mantzarlis @mantzarlis.com · 17/09/2026
We continue to track the share of AI contributed posts on X's Community Notes on @indicator.media. Last Friday we saw a new high, with more than two-thirds (67.94%) of the notes coming from a bot. indicator.media/ai-community...
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Alexios Mantzarlis @mantzarlis.com · 17/09/2026
accountability commenting right here
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Alexios Mantzarlis @mantzarlis.com · 17/09/2026
IDK if I'm going to take this Masterclass from you, Pedro
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Alexios Mantzarlis @mantzarlis.com · 15/09/2026
This is the 116th reported case logged on @indicator.media's map of AI nudifiers being used in school communities, launched with @mattburgess1.bsky.social or @wired.com earlier this year. indicator.media/nudifiers-un...
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Alexios Mantzarlis @mantzarlis.com · 10/09/2026
oh no, the US government actually asked decent questions about content moderation and online information quality (this re: the UK's green paper on boosting "trustworthy media providers" online) uk.usembassy.gov/u-s-governme...
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Alexios Mantzarlis @mantzarlis.com · 10/09/2026
Posts that have gone without a note despite AFP publishing a fact check about them include false claims about children’s vaccines, the health benefits of nicotine pouches, and voter fraud in the NYC mayoral election. Identical posts on X and Instagram carry a note on the first but not the latter.
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Alexios Mantzarlis @mantzarlis.com · 10/09/2026
Maybe. But Community Notes appear to be targeting something different from fact-checkers. There are only 5 Community Notes on the 166 Insta posts fact-checked by AFP's US bureau since April 2025. This is much lower than the 20.5% rate on X, hardly an oasis of quality information.
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Alexios Mantzarlis @mantzarlis.com · 26/08/2026
Also as self-serving as this comment may have been, I'm glad to take it as a sign that Trust & Safety ain't going anywhere
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Alexios Mantzarlis @mantzarlis.com · 20/08/2026
Not quite, YouTube auto caption, not quite
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Alexios Mantzarlis @mantzarlis.com · 30/07/2026
I feel like @dwillner.bsky.social will have thoughts on how useful this "Seems like AI slop" reporting button will be for LinkedIn www.linkedin.com/posts/hsrini...
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Alexios Mantzarlis @mantzarlis.com · 30/07/2026
tag yourself. i'm "Cote d'Ivoire"
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Alexios Mantzarlis @mantzarlis.com · 26/06/2026
Ambassadors have been recalled for less grievous offenses
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Alexios Mantzarlis @mantzarlis.com · 25/06/2026
big believer in platforms doing more to fight misinformation, but not sure the UK government defining "trustworthy news providers" is an implementable solution hansard.parliament.uk/commons/2026...
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Alexios Mantzarlis @mantzarlis.com · 25/06/2026
Incredible stuff. Flemish newspaper De Standaard listed the Belgian Prime Minister's residence on AirBnB (using his name as host) and got approved. The listing was up for two months. (h/t @mschenk.bsky.social) www.belganewsagency.eu/belgian-news...
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Alexios Mantzarlis @mantzarlis.com · 24/06/2026
After publication, I got detailed responses on this matter from the Château de Versailles. Here are some highlights
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Alexios Mantzarlis @mantzarlis.com · 24/06/2026
Google said it removed some ads that violated policy. The affected websites claim to be very clear with customers but somehow decided to add a bar at the top of their website flagging that they are not the official website after we reached out.
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Alexios Mantzarlis @mantzarlis.com · 24/06/2026
For example, the official Louvre site charges an adult €22.00 for a ticket; the ticket trap charges €76.00. Ballparking based on their reach, the sites may have cost customers more than €2,000,000 in excess charges.
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Alexios Mantzarlis @mantzarlis.com · 24/06/2026
Two Spanish operators running 20+ lookalike domains for the official sites have flooded Google with ads for {attraction name} + tickets. They then overcharge for a base ticket by a factor of 2x to 7x.
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Alexios Mantzarlis @mantzarlis.com · 18/06/2026
lol come on Geminiii
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Alexios Mantzarlis @mantzarlis.com · 18/06/2026
I have typically found that Community Notes leaves good fact checks out but doesn't allow bad fact checks in. Yet in this case a "helpful" note actually makes a false statement (the image is AI-generated). Not great. h/t @mxbernhard.bsky.social
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Alexios Mantzarlis @mantzarlis.com · 17/06/2026
Sometimes you have to (metaphorically) kill off an emu to fact-check a shady marketing firm.
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Alexios Mantzarlis @mantzarlis.com · 15/06/2026
Looks fixed on main but behind the “more matches” interstitial on iPhone I still see the problem…
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Alexios Mantzarlis @mantzarlis.com · 15/06/2026
Can someone at Google PLEASE fix these flags already
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Alexios Mantzarlis @mantzarlis.com · 12/06/2026
this seems totally reasonable i'm sure it will pan out exactly as projected
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Alexios Mantzarlis @mantzarlis.com · 11/06/2026
Pangram's CEO told me that "the tools and algorithms of the future are all probabilistic" but some professors and university administrators think using AI text detection in higer ed is "conceptually unsound,” because it “cannot meet the evidentiary threshold required."
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Alexios Mantzarlis @mantzarlis.com · 11/06/2026
Following some friendly pushback by @informor.bsky.social, I also tried to see how much I could generalize from the gaps I found. In about 4% of my subsequent tests, I found that slight inversions of text could flip the verdict completely (see example below).
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Alexios Mantzarlis @mantzarlis.com · 11/06/2026
Rhyming, inverted text, archaic language, and repetition were the strongest predictors that synthetic text would be branded as human-written.
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Alexios Mantzarlis @mantzarlis.com · 11/06/2026
Excuse me but AAAAAAAAAAAAAAAAAAAAAAAAAAHHHHHHHHH!!!!!!!!!
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Alexios Mantzarlis @mantzarlis.com · 08/06/2026
What is going on here
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Alexios Mantzarlis @mantzarlis.com · 08/06/2026
Spain 🇪🇸 Cape Verde 🇨🇻 represented as Norway 🇳🇴 Iran 🇮🇷
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Alexios Mantzarlis @mantzarlis.com · 07/06/2026
It’s a vexillological bloodbath in Google’s World Cup schedule preview right now
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Alexios Mantzarlis @mantzarlis.com · 06/06/2026
FacT-checKinG iS cen$or$hip
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Alexios Mantzarlis @mantzarlis.com · 04/06/2026
After Indicator reached out, Apple and Google deleted 43 of the unsafe apps flagged by the audit.
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Alexios Mantzarlis @mantzarlis.com · 04/06/2026
(here's the study's testing approach)
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Alexios Mantzarlis @mantzarlis.com · 31/05/2026
Beautiful day to see Gotham FC — Jordyn Dudley’s going places
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Alexios Mantzarlis @mantzarlis.com · 30/05/2026
This is nuts
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Alexios Mantzarlis @mantzarlis.com · 29/05/2026
hm, are those really the two options for children's titles
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Alexios Mantzarlis @mantzarlis.com · 27/05/2026
I am a bit hesitant to engage with a reply this aggressive — I haven’t “demanded” anything of anyone, shared most findings in this free thread, and my academic position ends in one month — but I will assume good will. We know $12.95/mo is not trivial and offer discounted memberships (1/2)
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Alexios Mantzarlis @mantzarlis.com · 26/05/2026
My analysis also suggests that AI supercontributors focus less on politicians and hyperpartisan accounts. This may be because they are optimizing for a bridging algorithm that prioritizes broad consensus over factuality.
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Alexios Mantzarlis @mantzarlis.com · 26/05/2026
AI contributors aren’t just replacing the humans who are supposed to make up the community in Community Notes. They are publishing in languages and on topics that reflect the bias of their algorithmic setup. Japanese notes - a big chunk of human notes - are trivial in the synthetic corpus.
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Alexios Mantzarlis @mantzarlis.com · 26/05/2026
Community Notes was supposed to bring scale and legitimacy to the fight against misinformation by empowering users to participate in fact-checking. Now that power is increasingly in the hands of a tiny group of hobbyists and researchers.
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Alexios Mantzarlis @mantzarlis.com · 26/05/2026
When (then) Birdwatch launched, Twitter said it would “broaden the range of voices” fighting misinformation. In 2026 was copied by Mark Zuckerberg, who called X's experiment a way to “empower their community.”
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Alexios Mantzarlis @mantzarlis.com · 25/05/2026
i mean i guess technically it's doing as asked, so is it really refusing the request?
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Alexios Mantzarlis @mantzarlis.com · 25/05/2026
te, he
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Alexios Mantzarlis @mantzarlis.com · 25/05/2026
lol (h/t www.theverge.com/tech/936176/...)
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Alexios Mantzarlis @mantzarlis.com · 21/05/2026
I both love and hate these businesses trying to game Google Maps searches with their names (h/t @davidsullivan.bsky.social who first alerted me to this phenomenon)
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