GPT-5.4 solved a Tier 4 FrontierMath problem that took its creator, Polish mathematician Bartosz Naskręcki, 20 years to develop. Naskręcki had pre-tested against o4-mini-high and added deliberate stumbling blocks to make the problem AI-proof. Only 1 of 11 attempts succeeded — but it worked “smoothly, methodically.” Eight months earlier, he’d publicly called AI “a very advanced calculator.” Now he calls it his “Move 37.” The capability frontier isn’t approaching — it arrived.
Mar 14, 2026 · 6 min