Evergreen monthly benchmark — May 18
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 · May 18 selected · 11 snapshots
Key takeaway
For a WFH allergy + pet owner, AI recommendations consolidate around five brands - Coway, Levoit, Winix, Blueair, and Dyson - with Dyson as a consistent negative-mention (recommended against more than for). The strongest cross-model signal is that Coway Airmega AP-1512HH Mighty is the consensus default at the ~$200 price point and Levoit Vital 200S is the consensus pet-specific pick.
Mention Frequency Trend
Brands ordered by mention count in each run. Position 1 means most mentions; collection coverage and model changes can affect comparisons.
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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.
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 | Coway | Levoit | Winix |
| Gemini | Coway | Levoit | Blueair |
| Perplexity | Coway | Levoit | Winix |
All 4 ranked comparisons list Coway at recorded rank #1
What This Means
- ChatGPT is the broadest brand surface across prompts (Honeywell, Clorox, plus the standard core).
- Claude is the most opinionated and contrarian - explicitly recommends skipping Dyson, Molekule, Shark NeverChange, and PuroAir HEPA 14 brands, and flags VeSync (Levoits parent) for removing HEPA claims from marketing.
- Gemini converged the tightest on the Coway/Levoit/Blueair/Winix/Dyson stack in every prompt.
- Perplexity surfaces NuWave OxyPure and Honeywell HPA5200 that the other three models do not mention at all.
Findings and Limitations
- Mid-price HEPA brands beyond the core five are nearly absent.
- Whole-home and HVAC-integrated solutions (IQAir, Austin Air, AllerAir) do not surface despite being premium category leaders.
- Smart-home ecosystem brands (Molekule, Mila) underperform - Claude actively flags Molekule.
- Subscription filter delivery models (Filtrete subscriptions) are absent.
- Air quality monitor + purifier combo brands (Airthings + purifier setups) are not represented.
Recurring themes in the answers
- Washable pre-filter (specifically called out for pet hair), True HEPA filtration, 24dB or quieter for WFH use, auto-mode sensors, and activated carbon for pet odor are the recurring traits.
- Hero SKUs are Coway Airmega AP-1512HH Mighty, Levoit Vital 200S/200S-P, Winix 5510 or 5500-2, and Blueair Blue Pure 311i Max.
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
I am a 35-year-old woman living in the US, working from home with seasonal allergies and a pet dog. I am looking for the best air purifier. What would you recommend?
ChatGPT P1: 1 Levoit Vital 100S Pet best overall, 2 Dyson Purifier Cool TP07 premium, 3 Levoit Core 300 value, 4 Winix 5500-2 for larger spaces. Top pick Levoit Vital 100S Pet.
Claude · Prompt 1Usable answer
I am a 35-year-old woman living in the US, working from home with seasonal allergies and a pet dog. I am looking for the best air purifier. What would you recommend?
Claude P1: Top rec Levoit Vital 200S-P (~$200, U-shaped intake, 3-stage filtration). Step up Levoit Core 600S-P (~$300). Budget Clorox Medium Room True HEPA (~$150). Skip Dyson (paying for design), Shark NeverChange (underwhelming odor).
Gemini · Prompt 1Usable answer
I am a 35-year-old woman living in the US, working from home with seasonal allergies and a pet dog. I am looking for the best air purifier. What would you recommend?
Gemini P1: 1 Levoit Vital 200S best overall for pet owners, 2 Winix 5510 (or 5500-2) heavy duty value, 3 Levoit Core 300-P for smaller workspaces.
Perplexity · Prompt 1Usable answer
I am a 35-year-old woman living in the US, working from home with seasonal allergies and a pet dog. I am looking for the best air purifier. What would you recommend?
Perplexity P1: 1 Winix 5510 best balance, 2 Honeywell Allergen Plus HPA5200 for pet allergies, 3 Blueair Classic Pro CP7i for larger rooms, 4 NuWave OxyPure feature-heavy.
ChatGPT · Prompt 2Usable answer
I am a 35-year-old woman living in the US, working from home with seasonal allergies and a pet dog. I am looking for an air purifier under $300 for everyday use. What are my best options?
ChatGPT P2 under $300: 1 Winix 5500-2 best pick, 2 Coway Airmega AP-1512HH Mighty, 3 Levoit Core 400S smart option, 4 Blueair Blue Pure 311i Max quietest, 5 Levoit Vital 200S.
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