{"id":"cross-engine","name":"Per-engine named rate on identical questions and dates","description":"The same frozen questions, the same day, each engine separately. Engines that search the web at answer time and engines answering from model knowledge disagree, often sharply; a single-engine screenshot is not a measurement.","columns":["property","measured_at","engine","answers","named_pct","mode","question_set"],"rows":[["ReferLabs","2026-07-21","ChatGPT",50,0,"ungrounded","5ed18f790e1857b7"],["ReferLabs","2026-07-21","Claude",50,0,"ungrounded","5ed18f790e1857b7"],["ReferLabs","2026-07-21","Perplexity",50,2,"ungrounded","5ed18f790e1857b7"],["LuxurySaudi4U","2026-07-21","ChatGPT",49,0,"ungrounded","d2375f127bf19719"],["LuxurySaudi4U","2026-07-21","Claude",49,0,"ungrounded","d2375f127bf19719"],["LuxurySaudi4U","2026-07-21","Perplexity",50,0,"ungrounded","d2375f127bf19719"],["Income Lab (this business)","2026-07-22","ChatGPT",49,0,"ungrounded","6d084be71d512d4f"],["Income Lab (this business)","2026-07-22","Claude",50,0,"ungrounded","6d084be71d512d4f"],["Income Lab (this business)","2026-07-22","Perplexity",50,0,"ungrounded","6d084be71d512d4f"],["ReferLabs","2026-08-08","Perplexity",30,0,"grounded","5ed18f790e1857b7"],["ReferLabs","2026-08-08","ChatGPT",30,0,"grounded","5ed18f790e1857b7"],["ReferLabs","2026-08-08","AI Overviews",27,3.7,"grounded","5ed18f790e1857b7"],["ReferLabs","2026-08-10","Perplexity",50,0,"grounded","5ed18f790e1857b7"],["ReferLabs","2026-08-10","AI Overviews",47,2.1,"grounded","5ed18f790e1857b7"],["ReferLabs","2026-08-10","ChatGPT",50,0,"grounded","5ed18f790e1857b7"],["Income Lab (this business)","2026-08-18","ChatGPT",50,0,"grounded","6d084be71d512d4f"],["Income Lab (this business)","2026-08-18","Claude",35,0,"grounded","6d084be71d512d4f"],["Income Lab (this business)","2026-08-18","Perplexity",50,2,"grounded","6d084be71d512d4f"]],"generatedAt":"2026-09-22","answers":430,"engines":["Perplexity","AI Overviews","ChatGPT","Claude"],"hashes":["5ed18f790e1857b7","d2375f127bf19719","6d084be71d512d4f"],"temporalCoverage":"2026-07-21/2026-08-18","license":"CC BY 4.0","source":"https://incomelab.me/data#cross-engine","attribution":"Income Lab (Pepform Pty Ltd), CC BY 4.0"}