Evergreen monthly benchmark — Jul 22
Air Purifiers
Research by Robert Hu · Published by RecoScope ·
- Usable answers
- 12/12
- Models
- 4
- Prompt types
- 3
Included: ChatGPT, Claude, Gemini, Perplexity
Report history · Jul 22 selected · 11 snapshots
Key takeaway
For an allergy-and-kids WFH family, AI consolidates around Levoit, Coway, and Blueair - all three in every single response for the second run running - with Winix the consistent fourth and Dyson named only to be dismissed on value. The notable movement is at the edges: IQAir surfaced for the first time at the premium end and Clorox entered as a two-engine value pick. The new decision axis is ozone and ionization, with engines now naming specific features to disable on specific brands around young children.
Mention Frequency Trend
Brands ordered by mention count in each run. Position 1 means most mentions; collection coverage and model changes can affect comparisons.
Scroll sideways to see all dates and labels.
Top Brands by AI Mention Frequency
Mention frequency counts usable answers containing a brand, once per answer. Unranked and critical mentions count as visibility. Recommendation ranks are shown separately below.
Most Mentioned = most answers mentioning a brandTied #1 = tied for most mentionsTop 3 across models = a recorded top-three rank in multiple comparisonsRanked #1 in [Model] = first in that comparative answerUnranked mentions = visibility without an inferred rank
1LevoitMost Mentioned12/12
2BlueairTop 3 across models10/12
2CowayTop 3 across models10/12
4Winix6/12
5Dyson3/12
Cross-Agent Comparison
Recorded ranks from the comparative prompt (Prompt 3). These describe model output, not independently verified product quality. Historical parsing conventions may differ.
4/4 models with recorded ranks
| Agent | #1 | #2 | #3 |
|---|---|---|---|
| ChatGPT | Coway | Blueair | Levoit |
| Claude | Levoit | Blueair | Coway |
| Gemini | Coway | Levoit | Blueair |
| Perplexity | Coway | Blueair | Levoit |
What This Means
- All four engines agree on Levoit as the aggregate #1 - the first unanimous top pick this category has produced, and a direct payoff of the kid-safety positioning: Levoit is credited by name for its Display Lock and Child Lock in three separate engines.
- ChatGPT and Gemini both follow with Coway second and Blueair third, and Perplexity has Coway second, so the familiar three-brand core holds for three of four engines.
- Claude is the outlier below first place, with Clorox second and Honeywell third, and that ordering deserves a caveat: both brands appear exactly once in Claude's three responses, each at rank two, which produces a stronger mean rank than Blueair and Coway earn across multiple appearances at lower positions.
- The same effect places Clorox third for Perplexity.
- A single well-placed mention can outrank consistent top-five presence under mean-rank aggregation, so these positions reflect placement quality rather than breadth of endorsement.
- ChatGPT is the broadest commerce surface, price-tagging a dozen-plus SKUs and the only engine to surface IQAir, LG, and Alen - it also carries the most detailed ozone guidance, naming which specific features to disable on each brand.
- Claude is the most testing-citation-driven and the only engine to elevate AirDoctor to top-tier, while offering the most skeptical read on child locks.
- Gemini is the most attribute-tabled, scoring noise, kid features, and filter cost side by side with explicit CARB framing.
- Perplexity is the most source-attributed, naming Wirecutter, RTINGS, and HouseFresh for each position, and uniquely surfaces RabbitAir and the newcomer MORENTO.
Findings and Limitations
- The category remains a three-brand lock with a long single-engine tail, but two previously-noted gaps closed this run.
- IQAir entered for the first time, meaning the premium whole-home tier is no longer entirely absent, though it appears in only one engine and only as an aspirational price-no-object option.
- Clorox entered as a value pick in two engines, showing a mass-market household brand can surface on simplicity rather than specs.
- Still absent despite category authority: Austin Air, AllerAir, Molekule, and Mila.
- The budget tier below Levoit stays fragmented and single-engine (MORENTO, Clorox, Alen), with no cross-model budget winner.
- The most actionable open position is certification: AAFA asthma-and-allergy-friendly certification and CARB ozone-free status are both cited as trust signals, but no brand has built cross-model presence on either - RabbitAir carries the AAFA claim in one engine only.
Recurring themes in the answers
Inspect the captured answers
Saved response text is model output. Product and health claims are unverified. Tables and cards may be transcribed as text; source labels can remain. Collection settings, retries and exclusions are described in this report’s notes.
ChatGPT · Prompt 1Usable answer
Best air purifiers, 35yo WFH parent, seasonal allergies, young kids
ChatGPT P1: Prioritize True HEPA, high CADR for room size, quiet operation, low filter costs, no ozone-producing features. Best overall Levoit Vital 200S-P ($169.99, the model I would buy for most families, excellent value, quiet enough for home office or bedroom, smart auto mode, reasonably priced replacement filters). Also excellent: Coway Airmega 200M ($213.09, long-time favorite, extremely reliable, simple, consistently performs well in independent testing). Levoit Core 400S ($181.92, better if home office opens into larger living space). Shark NeverChange MAX ($399.99, long-life filter design reduces maintenance). If money no concern IQAir HealthPro Plus XE ($1,199.99, outstanding particle filtration, excellent for severe allergies, exceptional build, very effective during heavy pollen or wildfire smoke). Ranking: 1 Levoit Vital 200S-P best overall value, 2 Coway Airmega 200M most dependable, 3 Levoit Core 400S best larger rooms, 4 Shark NeverChange MAX lowest maintenance, 5 IQAir best premium. Aligns with independent testing where Levoit, Coway, Blueair, and IQAir consistently perform well. Two properly sized purifiers beat one oversized unit.
Claude · Prompt 1Usable answer
Best air purifiers, 35yo WFH parent, seasonal allergies, young kids
Claude P1: What matters most - true HEPA, low noise for work calls, ideally a child lock. Best overall Levoit Core 400S (top allergy pick across multiple 2026 reviews, true HEPA plus activated carbon, ~403 sqft, 22-52 dB, smart-enabled for phone control during a call). Best value Clorox Medium Room True HEPA (keeps showing up as the value pick, solid HEPA performance for a mid-size room without smart-home bells and whistles). Best for a small home office AirDoctor 1000 (sized well, rated highly for allergy performance without being oversized). Best if kids around a lot or need extra quiet Blueair Blue Pure 311i+ Max (HEPASilent captures very fine particles with less noise and energy draw). Tips: match CADR to room size at least two-thirds of square footage, look for a child lock (Levoit and Coway have one), run auto/quiet during calls, pair with HEPA vacuuming and weekly bedding washes.
Frequently Asked Questions
Which air purifiers brands appear most often?▾
Levoit appeared in 12 of 12 answers. This snapshot includes 12 usable answers from ChatGPT, Claude, Gemini, Perplexity. Mentions include comparisons and criticism.
Which brands rank first in the air purifiers comparison answers?▾
ChatGPT: Coway; Claude: Levoit; Gemini: Coway; Perplexity: Coway
Why do models give different air purifiers answers?▾
All four engines agree on Levoit as the aggregate #1 - the first unanimous top pick this category has produced, and a direct payoff of the kid-safety positioning: Levoit is credited by name for its Display Lock and Child Lock in three separate engines. ChatGPT and Gemini both follow with Coway second and Blueair third, and Perplexity has Coway second, so the familiar three-brand core holds for three of four engines. Claude is the outlier below first place, with Clorox second and Honeywell third, and that ordering deserves a caveat: both brands appear exactly once in Claude's three responses, each at rank two, which produces a stronger mean rank than Blueair and Coway earn across multiple appearances at lower positions. The same effect places Clorox third for Perplexity. A single well-placed mention can outrank consistent top-five presence under mean-rank aggregation, so these positions reflect placement quality rather than breadth of endorsement. ChatGPT is the broadest commerce surface, price-tagging a dozen-plus SKUs and the only engine to surface IQAir, LG, and Alen - it also carries the most detailed ozone guidance, naming which specific features to disable on each brand. Claude is the most testing-citation-driven and the only engine to elevate AirDoctor to top-tier, while offering the most skeptical read on child locks. Gemini is the most attribute-tabled, scoring noise, kid features, and filter cost side by side with explicit CARB framing. Perplexity is the most source-attributed, naming Wirecutter, RTINGS, and HouseFresh for each position, and uniquely surfaces RabbitAir and the newcomer MORENTO.