Evergreen monthly benchmark — Apr 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 · Apr 18 selected · 11 snapshots
Key takeaway
The air purifier market in AI recommendations is dominated by three brands: Levoit, Coway, and Blueair. Dyson has presence but poor positioning — multiple models flag it as overpriced. Premium brands like IQAir and Austin Air that dominate physical retail are invisible across all AI models.
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.
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 | Levoit | Blueair | Coway |
| Claude | Coway | Levoit | Blueair |
| Gemini | Levoit | Blueair | Coway |
| Perplexity | Coway | Blueair | Levoit |
What This Means
- ChatGPT heavily favors Levoit — 3 of 5 top picks in P1 are Levoit models.
- Claude is the most opinionated, explicitly calling Dyson overpriced and warning against AirDoctor by name.
- Gemini surfaces the widest range of brands including Alen.
- Perplexity is the most citation-driven, referencing Wirecutter and specific model testing.
Findings and Limitations
- Shark NeverChange only appears in ChatGPT and Gemini.
- Honeywell only appears in Claude and Perplexity.
- Alen only appears in Gemini and Perplexity.
- Dyson appears across all models but is ranked low or explicitly skipped.
- Major brands like IQAir, Austin Air, Molekule, and Rabbit Air are completely absent from all models.
Recurring themes in the answers
- All four models agree True HEPA is non-negotiable for allergies.
- Every model emphasizes quiet operation for toddler naps.
- All models warn against ionizers and ozone generators around children.
- Budget prompts consistently feature Levoit Core 300 series and Coway Mighty.
- Every model recommends running purifiers 24/7 on low rather than reactively.
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'm a 35-year-old mom living in the USA with seasonal allergies and a toddler at home, looking for the best air purifier. What would you recommend?
Top picks: 1. Levoit Core 400S $219.99 best overall. 2. Levoit Core 200S $68.94 best value. 3. Levoit Core Mini $59.99 best toddler room. 4. Coway Airmega 400S $749 best for large homes.
Claude · Prompt 1Usable answer
I'm a 35-year-old mom living in the USA with seasonal allergies and a toddler at home, looking for the best air purifier. What would you recommend?
Top pick: Coway Airmega AP-1512HH Mighty ~$230. Alternative: Levoit Vital 200S-P ~$220 for quiet bedroom. Skip Dyson, ionizers, ozone generators.
Gemini · Prompt 1Usable answer
I'm a 35-year-old mom living in the USA with seasonal allergies and a toddler at home, looking for the best air purifier. What would you recommend?
Top picks: 1. Blueair Blue Pure 311i+ Max gold standard. 2. Coway Airmega 250 or 400 best for large areas. 3. Levoit Core 400S best for nursery.
Perplexity · Prompt 1Usable answer
I'm a 35-year-old mom living in the USA with seasonal allergies and a toddler at home, looking for the best air purifier. What would you recommend?
Top picks: 1. Levoit Core 400S best overall. 2. Coway Airmega AP-1512HH Mighty best value. 3. Blueair Blue Pure 411i Max quieter option. Also Alen BreatheSmart for certified allergy-friendly.
ChatGPT · Prompt 2Usable answer
I'm a 35-year-old mom living in the USA with seasonal allergies and a toddler at home, looking for an air purifier under $300 for everyday use. What are my best options?
Under $300: 1. Blueair Blue Pure 311i Max $169.99 best overall. 2. Levoit Core 300 $99.99 best budget. 3. Levoit Core 300S $149.99 best smart option.
Frequently Asked Questions