{ "generatedAt": "2026-10-29T01:59:40.324Z", "edition": "October 2026 edition (ISO week 2026-W43, collected from 2026-10-23)", "run": "run_GygnVM2ezdPFo7Mu", "definitions": { "engineOverlapPct": "Per category: brands recommended by both engines divided by brands recommended by either (Jaccard), in percent; means and medians are over categories, each category weighted equally.", "intentOverlap": "Per category: brands in the budget answers and the premium answers (one answer per engine for each prompt, so usually 2 and 2) shared, divided by brands in either (Jaccard), in percent; mean over categories.", "leaderSharePct": "Per category: answers that recommend the most recommended brand divided by the category's answers, in percent.", "pctOfAnswersWithCitations": "Answers of that engine (or market) whose source list holds the domain, divided by that engine's answers with any source, in percent. OpenAI source lists are the pages its answer links; Perplexity source lists are the pages its search retrieved.", "withOwnSitePct": "Answers whose source list holds a domain whose first label equals a recommended brand's name with spaces and punctuation removed (samsung.com for Samsung). Misses country domains, parent companies and other store names.", "excludingAlternative": "The same measures without the October \"alternative to [brand]\" prompt (316 answers), which names a brand in the question.", "crossMarketUsCa": "US and Canada categories with the same name: per pair, brands recommended in both markets divided by brands recommended in either (Jaccard), mean over pairs. The ExcludingAlternative fields leave out the alternative prompt; they were added on 2026-10-29 by keep/blog/20261029-data/cross-market.mjs from the same run, which reproduced meanOverlapPct and every pair first." }, "totals": { "answers": 1587, "byEngine": { "openai": 800, "perplexity": 787 }, "byMarket": { "us": 993, "mx": 297, "ca": 297 }, "byEngineMarket": { "us:openai": 500, "us:perplexity": 493, "mx:openai": 150, "mx:perplexity": 147, "ca:openai": 150, "ca:perplexity": 147 }, "categories": { "us": 100, "mx": 30, "ca": 30 }, "attempted": 1600, "missing": [ { "engine": "perplexity", "market": "ca", "intent": "budget", "answers": 1 }, { "engine": "perplexity", "market": "ca", "intent": "premium", "answers": 2 }, { "engine": "perplexity", "market": "mx", "intent": "best", "answers": 2 }, { "engine": "perplexity", "market": "mx", "intent": "use_case", "answers": 1 }, { "engine": "perplexity", "market": "us", "intent": "alternative", "answers": 4 }, { "engine": "perplexity", "market": "us", "intent": "budget", "answers": 1 }, { "engine": "perplexity", "market": "us", "intent": "premium", "answers": 1 }, { "engine": "perplexity", "market": "us", "intent": "use_case", "answers": 1 } ] }, "models": [ { "engine": "openai", "model": "gpt-6-luna", "answers": 800 }, { "engine": "perplexity", "model": "perplexity/sonar", "answers": 787 } ], "lengthByEngine": { "openai": { "meanChars": 1165, "medianChars": 1133 }, "perplexity": { "meanChars": 1286, "medianChars": 1269 } }, "recommendations": { "totalRecommended": 4540, "onlyMentioned": 333, "brandsPerAnswer": { "all": { "answers": 1587, "mean": 2.9, "median": 3, "zeroPct": 2.7, "oneToThreePct": 70.3, "fourToSixPct": 23.9, "sevenPlusPct": 3 }, "byEngine": { "openai": { "answers": 800, "mean": 2.7, "median": 2, "zeroPct": 3.9, "oneToThreePct": 71.8, "fourToSixPct": 22.3, "sevenPlusPct": 2.1 }, "perplexity": { "answers": 787, "mean": 3, "median": 3, "zeroPct": 1.5, "oneToThreePct": 68.9, "fourToSixPct": 25.7, "sevenPlusPct": 3.9 } }, "byMarket": { "us": { "answers": 993, "mean": 2.9, "median": 2, "zeroPct": 1.4, "oneToThreePct": 72, "fourToSixPct": 23.7, "sevenPlusPct": 2.9 }, "mx": { "answers": 297, "mean": 2.8, "median": 2, "zeroPct": 8.4, "oneToThreePct": 64, "fourToSixPct": 24.2, "sevenPlusPct": 3.4 }, "ca": { "answers": 297, "mean": 2.9, "median": 3, "zeroPct": 1.3, "oneToThreePct": 71, "fourToSixPct": 24.6, "sevenPlusPct": 3 } }, "byIntent": { "budget": { "answers": 318, "mean": 2.2, "median": 2, "zeroPct": 0.3, "oneToThreePct": 93.4, "fourToSixPct": 6.3, "sevenPlusPct": 0 }, "use_case": { "answers": 318, "mean": 2.2, "median": 2, "zeroPct": 4.1, "oneToThreePct": 87.1, "fourToSixPct": 8.5, "sevenPlusPct": 0.3 }, "alternative": { "answers": 316, "mean": 5, "median": 5, "zeroPct": 0, "oneToThreePct": 13.6, "fourToSixPct": 72.8, "sevenPlusPct": 13.6 }, "best": { "answers": 318, "mean": 2.4, "median": 2, "zeroPct": 9.1, "oneToThreePct": 72.3, "fourToSixPct": 17.9, "sevenPlusPct": 0.6 }, "premium": { "answers": 317, "mean": 2.6, "median": 2, "zeroPct": 0, "oneToThreePct": 84.9, "fourToSixPct": 14.5, "sevenPlusPct": 0.6 } } } }, "agreement": { "categories": 160, "meanOverlapPct": 53.6, "medianOverlapPct": 54.5, "overlapByMarket": { "us": 53.2, "mx": 54.8, "ca": 53.9 }, "meanBrandsOnlyOneEngine": 6.2, "meanBrandsBothEngines": 5.9 }, "concentration": { "meanDistinctBrandsPerCategory": 12.2, "medianDistinctBrandsPerCategory": 11, "meanLeaderSharePct": 62.7, "medianLeaderSharePct": 60, "categoriesLeaderInHalfOrMorePct": 81.9, "meanShareOfBrandsNamedOnce": 42.1, "meanFirstNamedIsLeaderPct": 44.5, "meanAnswersPerCategory": 9.9 }, "intentAgreement": { "categories": 160, "categoriesWithTwoBudgetAndTwoPremiumAnswers": 155, "meanBudgetPremiumOverlapPct": 8.2, "meanBestBudgetOverlapPct": 23.8, "meanBestPremiumOverlapPct": 26.8, "categoriesNoBudgetPremiumOverlapPct": 70 }, "alternativePrompt": { "answers": 316, "answersWhereTheNamedBrandWasFound": 296, "namedBrandAlsoRecommended": 21, "namedBrandAlsoRecommendedPct": 7.1 }, "excludingAlternative": { "agreement": { "categories": 160, "meanOverlapPct": 47, "medianOverlapPct": 46.45, "overlapByMarket": { "us": 47.5, "mx": 46.3, "ca": 45.9 }, "meanBrandsOnlyOneEngine": 5.3, "meanBrandsBothEngines": 3.9 }, "concentration": { "meanDistinctBrandsPerCategory": 9.2, "medianDistinctBrandsPerCategory": 8, "meanLeaderSharePct": 62.3, "medianLeaderSharePct": 62.5, "categoriesLeaderInHalfOrMorePct": 80, "meanShareOfBrandsNamedOnce": 48.4, "meanFirstNamedIsLeaderPct": 49.2, "meanAnswersPerCategory": 7.9 }, "brandsPerAnswer": { "all": { "answers": 1271, "mean": 2.3, "median": 2, "zeroPct": 3.4, "oneToThreePct": 84.4, "fourToSixPct": 11.8, "sevenPlusPct": 0.4 }, "byEngine": { "openai": { "answers": 640, "mean": 2.2, "median": 2, "zeroPct": 4.8, "oneToThreePct": 85.5, "fourToSixPct": 9.1, "sevenPlusPct": 0.6 }, "perplexity": { "answers": 631, "mean": 2.5, "median": 2, "zeroPct": 1.9, "oneToThreePct": 83.4, "fourToSixPct": 14.6, "sevenPlusPct": 0.2 } }, "byMarket": { "us": { "answers": 797, "mean": 2.4, "median": 2, "zeroPct": 1.8, "oneToThreePct": 85.4, "fourToSixPct": 12.5, "sevenPlusPct": 0.3 }, "mx": { "answers": 237, "mean": 2.2, "median": 2, "zeroPct": 10.5, "oneToThreePct": 78.5, "fourToSixPct": 9.7, "sevenPlusPct": 1.3 }, "ca": { "answers": 237, "mean": 2.3, "median": 2, "zeroPct": 1.7, "oneToThreePct": 86.9, "fourToSixPct": 11.4, "sevenPlusPct": 0 } } }, "categories": [ { "id": "mattresses", "name": "Mattresses", "group": "Home", "market": "us", "updatedFromNov": true, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 12, "leaderAnswers": 3, "leaderSharePct": 37.5, "brandsInOneAnswerOnly": 6, "engineBrands": { "openai": 9, "perplexity": 9, "both": 6, "union": 12 }, "engineOverlapPct": 50, "firstNamedIsLeaderPct": 25 }, { "id": "bed-sheets", "name": "Bed sheets", "group": "Home", "market": "us", "updatedFromNov": true, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 17, "leaderAnswers": 3, "leaderSharePct": 37.5, "brandsInOneAnswerOnly": 9, "engineBrands": { "openai": 11, "perplexity": 12, "both": 6, "union": 17 }, "engineOverlapPct": 35.3, "firstNamedIsLeaderPct": 37.5 }, { "id": "bath-towels", "name": "Bath towels", "group": "Home", "market": "us", "updatedFromNov": true, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 15, "leaderAnswers": 4, "leaderSharePct": 50, "brandsInOneAnswerOnly": 7, "engineBrands": { "openai": 10, "perplexity": 12, "both": 7, "union": 15 }, "engineOverlapPct": 46.7, "firstNamedIsLeaderPct": 12.5 }, { "id": "candles", "name": "Scented candles", "group": "Home", "market": "us", "updatedFromNov": true, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 17, "leaderAnswers": 4, "leaderSharePct": 50, "brandsInOneAnswerOnly": 10, "engineBrands": { "openai": 12, "perplexity": 12, "both": 7, "union": 17 }, "engineOverlapPct": 41.2, "firstNamedIsLeaderPct": 12.5 }, { "id": "office-chairs", "name": "Office chairs", "group": "Home", "market": "us", "updatedFromNov": true, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 6, "leaderAnswers": 6, "leaderSharePct": 75, "brandsInOneAnswerOnly": 3, "engineBrands": { "openai": 4, "perplexity": 5, "both": 3, "union": 6 }, "engineOverlapPct": 50, "firstNamedIsLeaderPct": 50 }, { "id": "standing-desks", "name": "Standing desks", "group": "Home", "market": "us", "updatedFromNov": false, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 9, "leaderAnswers": 5, "leaderSharePct": 62.5, "brandsInOneAnswerOnly": 5, "engineBrands": { "openai": 4, "perplexity": 8, "both": 3, "union": 9 }, "engineOverlapPct": 33.3, "firstNamedIsLeaderPct": 37.5 }, { "id": "cookware-sets", "name": "Cookware sets", "group": "Kitchen", "market": "us", "updatedFromNov": true, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 7, "leaderAnswers": 6, "leaderSharePct": 75, "brandsInOneAnswerOnly": 3, "engineBrands": { "openai": 6, "perplexity": 5, "both": 4, "union": 7 }, "engineOverlapPct": 57.1, "firstNamedIsLeaderPct": 25 }, { "id": "chef-knives", "name": "Chef knives", "group": "Kitchen", "market": "us", "updatedFromNov": true, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 9, "leaderAnswers": 5, "leaderSharePct": 62.5, "brandsInOneAnswerOnly": 6, "engineBrands": { "openai": 7, "perplexity": 5, "both": 3, "union": 9 }, "engineOverlapPct": 33.3, "firstNamedIsLeaderPct": 50 }, { "id": "coffee-grinders", "name": "Coffee grinders", "group": "Kitchen", "market": "us", "updatedFromNov": true, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 9, "leaderAnswers": 4, "leaderSharePct": 50, "brandsInOneAnswerOnly": 4, "engineBrands": { "openai": 7, "perplexity": 7, "both": 5, "union": 9 }, "engineOverlapPct": 55.6, "firstNamedIsLeaderPct": 25 }, { "id": "air-fryers", "name": "Air fryers", "group": "Kitchen", "market": "us", "updatedFromNov": false, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 7, "leaderAnswers": 5, "leaderSharePct": 62.5, "brandsInOneAnswerOnly": 4, "engineBrands": { "openai": 5, "perplexity": 5, "both": 3, "union": 7 }, "engineOverlapPct": 42.9, "firstNamedIsLeaderPct": 25 }, { "id": "robot-vacuums", "name": "Robot vacuums", "group": "Tech", "market": "us", "updatedFromNov": false, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 6, "leaderAnswers": 7, "leaderSharePct": 87.5, "brandsInOneAnswerOnly": 3, "engineBrands": { "openai": 3, "perplexity": 6, "both": 3, "union": 6 }, "engineOverlapPct": 50, "firstNamedIsLeaderPct": 37.5 }, { "id": "wireless-earbuds", "name": "Wireless earbuds", "group": "Tech", "market": "us", "updatedFromNov": false, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 14, "leaderAnswers": 4, "leaderSharePct": 50, "brandsInOneAnswerOnly": 6, "engineBrands": { "openai": 11, "perplexity": 10, "both": 7, "union": 14 }, "engineOverlapPct": 50, "firstNamedIsLeaderPct": 50 }, { "id": "portable-power-banks", "name": "Portable power banks", "group": "Tech", "market": "us", "updatedFromNov": false, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 5, "leaderAnswers": 7, "leaderSharePct": 87.5, "brandsInOneAnswerOnly": 4, "engineBrands": { "openai": 2, "perplexity": 4, "both": 1, "union": 5 }, "engineOverlapPct": 20, "firstNamedIsLeaderPct": 75 }, { "id": "mechanical-keyboards", "name": "Mechanical keyboards", "group": "Tech", "market": "us", "updatedFromNov": true, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 10, "leaderAnswers": 8, "leaderSharePct": 100, "brandsInOneAnswerOnly": 6, "engineBrands": { "openai": 8, "perplexity": 5, "both": 3, "union": 10 }, "engineOverlapPct": 30, "firstNamedIsLeaderPct": 62.5 }, { "id": "bluetooth-speakers", "name": "Bluetooth speakers", "group": "Tech", "market": "us", "updatedFromNov": false, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 7, "leaderAnswers": 8, "leaderSharePct": 100, "brandsInOneAnswerOnly": 4, "engineBrands": { "openai": 5, "perplexity": 5, "both": 3, "union": 7 }, "engineOverlapPct": 42.9, "firstNamedIsLeaderPct": 75 }, { "id": "carry-on-luggage", "name": "Carry-on luggage", "group": "Travel & Outdoors", "market": "us", "updatedFromNov": true, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 10, "leaderAnswers": 3, "leaderSharePct": 37.5, "brandsInOneAnswerOnly": 4, "engineBrands": { "openai": 9, "perplexity": 7, "both": 6, "union": 10 }, "engineOverlapPct": 60, "firstNamedIsLeaderPct": 0 }, { "id": "backpacks", "name": "Backpacks", "group": "Travel & Outdoors", "market": "us", "updatedFromNov": true, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 12, "leaderAnswers": 2, "leaderSharePct": 25, "brandsInOneAnswerOnly": 6, "engineBrands": { "openai": 7, "perplexity": 11, "both": 6, "union": 12 }, "engineOverlapPct": 50, "firstNamedIsLeaderPct": 75 }, { "id": "water-bottles", "name": "Water bottles", "group": "Travel & Outdoors", "market": "us", "updatedFromNov": true, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 6, "leaderAnswers": 4, "leaderSharePct": 50, "brandsInOneAnswerOnly": 2, "engineBrands": { "openai": 6, "perplexity": 4, "both": 4, "union": 6 }, "engineOverlapPct": 66.7, "firstNamedIsLeaderPct": 25 }, { "id": "camping-tents", "name": "Camping tents", "group": "Travel & Outdoors", "market": "us", "updatedFromNov": false, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 8, "leaderAnswers": 4, "leaderSharePct": 50, "brandsInOneAnswerOnly": 2, "engineBrands": { "openai": 7, "perplexity": 6, "both": 5, "union": 8 }, "engineOverlapPct": 62.5, "firstNamedIsLeaderPct": 50 }, { "id": "hiking-boots", "name": "Hiking boots", "group": "Travel & Outdoors", "market": "us", "updatedFromNov": false, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 16, "leaderAnswers": 5, "leaderSharePct": 62.5, "brandsInOneAnswerOnly": 9, "engineBrands": { "openai": 11, "perplexity": 12, "both": 7, "union": 16 }, "engineOverlapPct": 43.8, "firstNamedIsLeaderPct": 12.5 }, { "id": "running-shoes", "name": "Running shoes", "group": "Apparel & Fitness", "market": "us", "updatedFromNov": false, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 10, "leaderAnswers": 8, "leaderSharePct": 100, "brandsInOneAnswerOnly": 4, "engineBrands": { "openai": 8, "perplexity": 8, "both": 6, "union": 10 }, "engineOverlapPct": 60, "firstNamedIsLeaderPct": 75 }, { "id": "rain-jackets", "name": "Rain jackets", "group": "Apparel & Fitness", "market": "us", "updatedFromNov": false, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 6, "leaderAnswers": 6, "leaderSharePct": 75, "brandsInOneAnswerOnly": 0, "engineBrands": { "openai": 6, "perplexity": 6, "both": 6, "union": 6 }, "engineOverlapPct": 100, "firstNamedIsLeaderPct": 50 }, { "id": "mens-underwear", "name": "Men's underwear", "group": "Apparel & Fitness", "market": "us", "updatedFromNov": true, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 20, "leaderAnswers": 4, "leaderSharePct": 50, "brandsInOneAnswerOnly": 18, "engineBrands": { "openai": 8, "perplexity": 14, "both": 2, "union": 20 }, "engineOverlapPct": 10, "firstNamedIsLeaderPct": 25 }, { "id": "sunglasses", "name": "Sunglasses", "group": "Apparel & Fitness", "market": "us", "updatedFromNov": true, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 18, "leaderAnswers": 3, "leaderSharePct": 37.5, "brandsInOneAnswerOnly": 13, "engineBrands": { "openai": 11, "perplexity": 11, "both": 4, "union": 18 }, "engineOverlapPct": 22.2, "firstNamedIsLeaderPct": 57.1 }, { "id": "yoga-mats", "name": "Yoga mats", "group": "Apparel & Fitness", "market": "us", "updatedFromNov": true, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 6, "leaderAnswers": 5, "leaderSharePct": 62.5, "brandsInOneAnswerOnly": 1, "engineBrands": { "openai": 5, "perplexity": 6, "both": 5, "union": 6 }, "engineOverlapPct": 83.3, "firstNamedIsLeaderPct": 62.5 }, { "id": "dog-beds", "name": "Dog beds", "group": "Pets", "market": "us", "updatedFromNov": true, "answers": 8, "answersByEngine": { "openai": 4, "perplexity": 4 }, "answersByIntent": { "best": 2, "budget": 2, "premium": 2, "use_case": 2 }, "distinctBrands": 8, "leaderAnswers": 3, "leaderSharePct": 37.5, "brandsInOneAnswerOnly": 4, "engineBrands": { "openai": 6, "perplexity": 5, "both": 3, "union": 8 }, "engineOverlapPct": 37.5, "firstNamedIsLeaderPct": 28.6 }, { "id": "dog-harnesses", "name": "Dog 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