Frontier AI has broken the open CTF format
The author, an experienced CTF player, argues that advanced AI models like Claude Opus 4.5 and GPT-5.5 have made open online CTF competitions obsolete. AI can solve most medium and even hard challenges automatically, shifting the competition from human skill to AI orchestration and resource investment. The competitive format is dead, but the community can pivot to learning platforms and in-person events.
Frontier AI has broken the open CTF format
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