My Mental Model of AI Broke on September 8

September 8, 2026 feels different to me, assuming the reported mathematical proof is correct. I don't mean that AI passed another benchmark or became better at a task humans already know how to do. Most benchmarks can be beaten by some very smart human somewhere, so the comparison is still human performance versus machine performance. A genuinely correct solution to a previously unsolved Millennium Prize problem feels fundamentally different. If no human had the solution before, then the important fact is not that AI beat a human score, but that an AI system may have produced new mathematical knowledge that humanity did not have before. I am setting aside, for now, the drama around who produced the proof and who should receive credit. My point is about what this capability would mean if the proof is correct. That feels like a much more important boundary.