r/slatestarcodex is a subreddit with 82k members. The community frequently discusses looking for, ai, worst, philosophy, and technology, and they frequently recommend/review simulation software, charities, and nootropic, and the most common flair used is ai, rationality, misc, medicine, and politics.
Slate Star Codex was the former name for a blog by Scott Alexander about human cognition, politics, and medicine. In 2021, the name was changed to Astral Codex Ten: https://astralcodexten.substack.com/
Popular Topics in r/slatestarcodex
#1
Looking For
36 posts
#2
Ai
36 posts
#3
Worst
11 posts
#4
Philosophy
9 posts
#5
Technology
8 posts
#6
Hate
6 posts
#7
Intelligence
6 posts
#8
Writing
5 posts
#9
Future
5 posts
#10
Ethics
4 posts
Products Discussed in r/slatestarcodex
Simulation Software
1 review
#1
Microsoft Excel
3.0★ from 1 review
Charities
1 review
#1
Giving What We Can
5.0★ from 1 review
Nootropic
1 review
#1
Cerebrolysin
4.0★ from 1 review
Flair Used in r/slatestarcodex
#1
AI
: "Project Glasswing: Anthropic Shows The AI Train Isn't Stopping"
23 posts
#2
Rationality
: "Contra The Usual Interpretation Of “The Whispering Earring”"
7 posts
#3
Misc
: "Scott's call for a better dating app: Not A Zombie is now Live!"
6 posts
#4
Medicine
: "Why American ambulance rides are so expensive"
6 posts
#5
Politics
: "Another reason for "crime is declining, but people believe it’s getting worse""
6 posts
#6
Science
: "Where to Find the Colors Your Screen Can’t Show You"
5 posts
#7
Existential Risk
: "AI intelligence is so much weirder than we appreciate"
4 posts
#8
Psychology
: "My 6 year old is curious. My 9 year old is not curious."
3 posts
#9
Meta
: "slatestar/lesswrong were early on AI safety and prediction markets .... what's next that the public is still sleeping on?"
3 posts
#10
Fun Thread
: "The Bayesian priors aren’t very favorable: Shakespeare"
2 posts
Member Growth in r/slatestarcodex
Yearly
+10k members(13.9%)
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Last updated: July 26, 2026