Community Notes, but in minutes
Fact-checks arrive 18 hours late.
Half the damage is done in 6.
In X's own data, the ratings that decide a note are in after a median of 25 min. Readers see the note after 3.8 h. Fast Notes is a live room that scores every rating as it lands and calls in the side that's missing.
Watch it happen
One misleading post, two timelines.
The same real note, shown when X decides versus when a Fast Notes room settles it.
The problem
By the time a note appears, most people have already seen the post.
How much of a post's spread has already happened
Exponential curve with the measured 5.75 h half-life. Markers use real medians.
median from post to note display on X.
of reposts prevented today. Shown at hour 2 instead, notes would prevent 53.1%.
of ~1.8M notes ever reach consensus. The rest wait forever.
Sources: Chuai et al. 2024, Razuvayevskaya et al. 2025.
How a room works
Don't wait for consensus. Go and get it.
Spot the missing side
A note only goes live when people who usually disagree both call it helpful. Fast Notes reads the ratings so far and sees which side hasn't weighed in.
Recruit them, live
Instead of waiting hours for those raters to wander by, the room invites exactly them. Anyone whose side is already covered is asked to sit this one out.
Lock it when both agree
The same bridging model X uses (simplified) refits after every rating. Once both sides agree and it holds, the verdict locks. People decide; no AI does.
When does the fact-check show up?
Where it fits
A fast lane for the notes that matter most right now.
Community Notes contributors
Get pinged only when your side is the one a note is missing. No endless queue of notes you can't move.
Platforms
Open a room for a fast-spreading post and get a bridged verdict before most reposts happen.
Newsrooms and fact-checkers
Run the same room with your own reader panel during breaking news, with a record of how both sides rated.
Notes, ratings and timelines are real public data; live arrival in rooms is simulated. See the replay results.