{
  "slug": "engine-disagreement-phoenix-roofing",
  "title": "Engine disagreement: Roofing in Phoenix",
  "summary": "How often the AI engines that named a business name the same roofing business for the same Phoenix question, week of Oct 12, 2026: 6 questions compared; 8 more where fewer than two engines named a business were not.",
  "methodology": "For each question a homeowner asks in the trade's newest weekly run, we take each engine's most-named businesses (the ones named in the most of that engine's answers to the question, ties included) and compare them across engines. Only the engines that named a business on a question take part in it: an engine that answered but named nobody is left out of that question. A question is compared when at least two engines named a business; the questions where fewer than two did are counted apart and not compared. Every engine that named a business agrees when all of their most-named sets share a business; no two agree when no pair of them shares one; a pair overlaps when its two sets share a business, counted over the questions where both named a business. The questions are not published. 6 questions were compared; 8 where fewer than two engines named a business were not. Results describe what was measured, not a promise of ranking.",
  "sources": [
    {
      "name": "CiteMy.ai weekly prompt panel (first-party)",
      "url": "https://citemy.ai/about"
    }
  ],
  "cadence": "Weekly",
  "license": "CC BY 4.0",
  "author": "Ben Hinton",
  "updatedAt": "2026-10-18",
  "temporalCoverage": "2026-10-12/2026-10-18",
  "licenseUrl": "https://creativecommons.org/licenses/by/4.0/",
  "columns": [
    {
      "key": "measure",
      "label": "measure",
      "type": "text"
    },
    {
      "key": "engines",
      "label": "engines",
      "type": "text"
    },
    {
      "key": "questions",
      "label": "questions",
      "type": "number"
    },
    {
      "key": "questions_matching",
      "label": "questions_matching",
      "type": "number"
    },
    {
      "key": "share",
      "label": "share",
      "type": "number"
    },
    {
      "key": "week_start",
      "label": "week_start",
      "type": "date"
    }
  ],
  "rows": [
    {
      "measure": "every engine that named a business agrees",
      "engines": "each question's engines that named a business",
      "questions": 6,
      "questions_matching": 1,
      "share": 0.1667,
      "week_start": "2026-10-12"
    },
    {
      "measure": "no two engines that named a business agree",
      "engines": "each question's engines that named a business",
      "questions": 6,
      "questions_matching": 0,
      "share": 0,
      "week_start": "2026-10-12"
    },
    {
      "measure": "every engine that named a business agrees",
      "engines": "ChatGPT, Claude, Perplexity, Gemini",
      "questions": 5,
      "questions_matching": 1,
      "share": 0.2,
      "week_start": "2026-10-12"
    },
    {
      "measure": "no two engines that named a business agree",
      "engines": "ChatGPT, Claude, Perplexity, Gemini",
      "questions": 5,
      "questions_matching": 0,
      "share": 0,
      "week_start": "2026-10-12"
    },
    {
      "measure": "every engine that named a business agrees",
      "engines": "ChatGPT, Perplexity, Gemini",
      "questions": 1,
      "questions_matching": 0,
      "share": 0,
      "week_start": "2026-10-12"
    },
    {
      "measure": "no two engines that named a business agree",
      "engines": "ChatGPT, Perplexity, Gemini",
      "questions": 1,
      "questions_matching": 0,
      "share": 0,
      "week_start": "2026-10-12"
    },
    {
      "measure": "pair overlaps (both named a business)",
      "engines": "ChatGPT and Claude",
      "questions": 5,
      "questions_matching": 3,
      "share": 0.6,
      "week_start": "2026-10-12"
    },
    {
      "measure": "pair overlaps (both named a business)",
      "engines": "ChatGPT and Perplexity",
      "questions": 6,
      "questions_matching": 2,
      "share": 0.3333,
      "week_start": "2026-10-12"
    },
    {
      "measure": "pair overlaps (both named a business)",
      "engines": "ChatGPT and Gemini",
      "questions": 6,
      "questions_matching": 3,
      "share": 0.5,
      "week_start": "2026-10-12"
    },
    {
      "measure": "pair overlaps (both named a business)",
      "engines": "Claude and Perplexity",
      "questions": 5,
      "questions_matching": 5,
      "share": 1,
      "week_start": "2026-10-12"
    },
    {
      "measure": "pair overlaps (both named a business)",
      "engines": "Claude and Gemini",
      "questions": 5,
      "questions_matching": 3,
      "share": 0.6,
      "week_start": "2026-10-12"
    },
    {
      "measure": "pair overlaps (both named a business)",
      "engines": "Perplexity and Gemini",
      "questions": 6,
      "questions_matching": 2,
      "share": 0.3333,
      "week_start": "2026-10-12"
    },
    {
      "measure": "fewer than two engines named a business (not compared)",
      "engines": "",
      "questions": 14,
      "questions_matching": 8,
      "share": 0.5714,
      "week_start": "2026-10-12"
    }
  ]
}