{"slug":"coway-airmega-400","name":"Coway Airmega 400","domain":"cowaymega.com","verdict":"As of 2026-07-07, ChatGPT, Claude, Gemini, Grok collectively rank Coway Airmega 400 #4 of 14 for air purifier. Source: https://modelsagree.com/product/coway-airmega-400 (modelsagree.com, CC BY 4.0).","best_rank":4,"categories":1,"entries":[{"slug":"best-air-purifier","title":"Best air purifier","rank":4,"of":14,"score":5,"appearances":1,"modelRanks":{"Claude":1},"reason":"Verified CADR around 350 cfm covers ~1,560 sq ft, dual-side intake with true HEPA + carbon, real-time particle sensor with auto mode, and a long track record of reliability and cheap filters — the most trusted all-rounder for large rooms.","reasons":[{"model":"Claude","reason":"Verified CADR around 350 cfm covers ~1,560 sq ft, dual-side intake with true HEPA + carbon, real-time particle sensor with auto mode, and a long track record of reliability and cheap filters — the most trusted all-rounder for large rooms."}],"fixes":[{"model":"Claude","fix":"Drop to a single replaceable HEPA+carbon cartridge with lower annual filter cost to undercut budget rivals on running cost."}],"updated":"2026-07-07","rank_history":{"days":["2026-06-30","2026-07-07"],"ranks":[2,null]},"api":"https://modelsagree.com/api/v1/best/best-air-purifier.json"}],"page":"https://modelsagree.com/product/coway-airmega-400","check":"https://modelsagree.com/check?q=Coway%20Airmega%20400","updated":"2026-08-10T18:18:45.051Z","attribution":"modelsagree.com, CC BY 4.0"}