This started with Addition Under Pressure, where I gave Claude Code and Codex the same prompt: train the smallest possible transformer that can do 10-digit addition with at least 99% accuracy. Claude Code came back with 6,080 parameters and Codex came back with 1,644. The community has since pushed this dramatically lower.
Tehran’s ICBMs cannot currently reach the US, experts say, and White House has claimed its nuclear programme has been destroyed
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Publication date: 28 February 2026