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Andrej Karpathy avatar
Andrej Karpathy
@karpathy

a 20-min walkthrough of tokenisation from scratch. no libraries, no slides, just the byte pairs. this is the part of LLMs most people skip and it explains more weird behaviour than anything else.

Views
2,710,000
Likes
41,200
Reposts
9,340
Replies
1,870
Quotes
1,040
Bookmarks
58,600
Posted9:20 AM · Aug 18, 2026
2.7M views
Weighted score
49/100
×1.5 liftvs raw baseline 33
Rank 7 of 1,284 · 30d
Contribution by typeIndex points · sum 49
  • Quotes
    15
  • Reposts
    19
  • Replies
    8
  • Likes
    7
Index points = action share × author influence, summed per type; bars scale to 100
Score over timeWeightedRaw baseline
0501000h6h12h18h24hHours after postIndex (0–100)
ContributorsRanked by points
Account
Influence
Action
Cluster
Followers
Points
  • Greg Brockman avatar@gdb
    80STRONG
    Reposted
    Founders
    948K
    +5
  • Sam Altman avatar@sama
    84HIGH
    Liked
    Founders
    3.1M
    +1
  • Lex Fridman avatar@lexfridman
    82HIGH
    Quoted
    Media
    4.6M
    +5
  • swyx avatar@swyx
    66NOTABLE
    Replied
    Founders
    129K
    +2
  • + 53,446 others
    +36
Reached clustersShare of VIP impressions
  • Founders52%
  • VCs26%
  • Media8%
  • Hedge Funds5%
  • Other9%