{
  "id": 9808027,
  "title": "Yes, Claude can do Nine Loops",
  "url": "https://urgent.news/2026/09/25/yes-claude-can-do-nine-loops",
  "topic": "ai",
  "section": "AI",
  "published": "2026-09-25T18:11:48.000Z",
  "source": {
    "name": "Hacker News",
    "slug": "hacker-news",
    "url": "https://www.anthropic.com/research/yes-claude-can-do-nine-loops"
  },
  "original_language": "en",
  "account": "Matt von Hippel, a former theoretical physicist turned science writer, posed a challenge to AI companies that would ultimately be solved a month later. Von Hippel, who blogs about physics and AI, wanted to see an AI tackle a problem in his former subfield of theoretical particle physics. Amplitudeology, a branch of particle physics, deals with computing formulas called scattering amplitudes to predict the likelihood of subatomic particles reacting in specific ways. These calculations, known as scattering amplitudes, involve including a certain number of \"loops\" which measure the complexity of particle interactions. Most scattering amplitudes have only been calculated up to two loops, with a few reaching three. However, achieving more precise predictions requires calculating them up to a higher number of loops, which becomes computationally harder. Von Hippel specifically challenged AI to perform calculations up to nine loops on a toy model theory called N=4 super Yang-Mills, a particularly challenging problem in amplitudeology.",
  "summary": null,
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}