How AI Search Is Recommending Prestige Makeup Brands: Monthly Trends

Executive Summary

The category narrowed this month as the leader's lead over the second-place brand compressed. Charlotte Tilbury remains the category leader by valid recommendation coverage, but its lead over the second-place brand narrowed from 13.7 points in August 2026 to 10.7 points in September 2026. The benchmark shows a modest pullback across most tracked prestige makeup brands, with several well-known houses seeing reduced recommendation share in AI-generated answers.

The largest numeric increase this month came from Hourglass Cosmetics, which rose 1.3 points to 19.8% valid recommendation coverage in September 2026 from 18.5% in August 2026 — a change within normal month-to-month variation for this brand. Its rank-one coverage held steady at 1.7% (11 observations), and its top-three rate increased by 1.9 points to 9.3% (59 observations).

The sharpest decliner was NARS Cosmetics, which fell 5.4 points to 23.0% valid recommendation coverage in September 2026 from 28.4% in August 2026. This movement was the only significant decline in the category this month, with NARS also seeing its top-three rate drop 3.4 points to 8.2% (52 observations) and its raw mention presence fall 6.3 points to 36.8% (232 present in 631 observations).

Across the full series, eight of the ten tracked brands saw their valid recommendation coverage decline from August to September 2026, though only NARS Cosmetics moved beyond normal month-to-month variation. The category's overall recommendation-shaped answer share rose to 47.5% in September 2026 from 40.9% in August 2026, even as the qualified observation count fell to 631 from 675.

Each monthly run begins with 800 prompt-surface observations (642 unique questions in August 2026; 622 unique questions in September 2026) across the benchmark's defined AI/search surface universe. Of those, 800 in each month mentioned a tracked brand or competitor; 732 were relevant and 68 were irrelevant in August 2026, while 715 were relevant and 85 were irrelevant in September 2026. The public metrics use the 675 qualified observations in August 2026 and the 631 qualified observations in September 2026 that survive both qualification stages.

Key Findings

Benchmark Context

The report separates the raw collection universe from the qualified analysis set. Brand-level recommendation percentages are calculated within the qualified benchmark set.

These qualification stages define the denominator used for every brand-level percentage in this report; only the qualified observations are counted toward presence, coverage, placement, and sentiment metrics below.

Benchmark-Level Metrics

The July-to-August comparison shows Charlotte Tilbury had led Armani Beauty by 13.7 points in August 2026; that gap compressed to 10.7 points in September 2026. Most of the narrowing came from Charlotte Tilbury's own 4.8-point decline rather than from Armani Beauty's 1.8-point movement.

AI Recommendation Trend

The category leader holds, but the gap is narrowing as several prestige houses cluster closer together in recommendation share.

Only NARS Cosmetics moved beyond normal month-to-month variation in September 2026. The rest of the category's shift came from the combination of several smaller, individually stable movements that together compressed the distance between the leader and the brands immediately behind it.

What Changed This Month

NARS Cosmetics: A Significant Decline in AI Recommendation Share

NARS Cosmetics saw its valid recommendation coverage fall 5.4 points to 23.0% in September 2026 (145 of 631 qualified observations) from 28.4% in August 2026 (192 of 675 qualified observations). This was the only movement in the category classified as significant this month.

The brand's raw mention presence also declined 6.3 points to 36.8% (232 present in 631 observations) from 43.1% (291 present in 675) in August 2026. Its top-three recommendation rate fell 3.4 points to 8.2% (52 observations) from 11.6% (78 observations) in August 2026. Rank-one recommendations declined by a smaller 0.7 points to 1.1% (7 observations) from 1.8% (12 observations).

The distinction to notice is that NARS Cosmetics declined across both presence and recommendation quality simultaneously: it was mentioned in fewer answers, and when it was mentioned, it appeared in top-three slots less often. Net sentiment among mentions softened slightly to 0.7 from 0.8.

Highest-priority diagnostic: Which prompt types drove the recommendation losses, and which competitor took the recommendation in NARS Cosmetics' place?

Charlotte Tilbury and Dior Beauty: The Leader's Pullback

Charlotte Tilbury, the category leader, saw its valid recommendation coverage fall 4.8 points to 46.8% in September 2026 (295 of 631 observations) from 51.6% in August 2026 (348 of 675 observations). Dior Beauty declined 4.7 points to 28.5% (180 of 631) from 33.2% (224 of 675) over the same period.

Charlotte Tilbury's raw mention presence slipped 2.0 points to 69.4% (438 of 631 observations) from 71.4% (482 of 675), while Dior Beauty's presence fell 4.9 points to 55.0% (347 of 631) from 59.9% (404 of 675). Charlotte Tilbury remains the most widely mentioned brand in the category, appearing in more than two-thirds of qualified observations.

The distinction to notice is that both brands still dominate in presence, yet the recommendation attachment Charlotte Tilbury held in August 2026 weakened slightly. Charlotte Tilbury still leads the category by 10.7 points over Armani Beauty, a substantial margin even after the pullback.

Highest-priority diagnostic: Which answer formats or surfaces drove the coverage declines, and are these brands losing top-three placements to the same competitor?

The Hourglass Cosmetics and NARS Cosmetics Gap

The gap between Hourglass Cosmetics and NARS Cosmetics narrowed this month, from 9.9 points in August 2026 to 3.2 points in September 2026. Hourglass Cosmetics rose 1.3 points to 19.8% valid recommendation coverage (125 observations), while NARS Cosmetics fell 5.4 points to 23.0% (145 observations).

The gap between Charlotte Tilbury and Hourglass Cosmetics also compressed, from 33.1 points in August 2026 to 27.0 points in September 2026, though Charlotte Tilbury remains firmly ahead. Dior Beauty's gap to Hourglass Cosmetics narrowed from 14.7 points to 8.7 points over the same period.

The pattern across the category shows several established houses recording lower coverage this month while Hourglass Cosmetics recorded a modest, consistent gain, improving its top-three rate by 1.9 points to 9.3% (59 observations) and its rank-one rate by 0.1 points to 1.7% (11 observations). The data describes this narrowing distribution; it does not establish whether the movement reflects competitive displacement, evidence-layer differences, or normal month-to-month variation.

Highest-priority diagnostic: Is Hourglass Cosmetics rising because of its own improved visibility, or because specific competitors are losing coverage in shared prompt sets?

Armani Beauty: Holding Near the Top While Others Slip

Armani Beauty dipped 1.8 points to 36.1% valid recommendation coverage in September 2026 (228 of 631 observations) from 37.9% in August 2026 (256 of 675 observations). This movement was within normal variation. Importantly, the brand's rank-one recommendation rate rose 3.3 points to 15.5% (98 observations) from 12.2% (82 observations).

Armani Beauty now holds the strongest rank-one position in the category and a leading top-three rate of 27.3% (172 observations), up 2.3 points from August 2026. The brand's rank-one gains came even as its overall coverage slipped slightly.

The distinction to notice is that Armani Beauty's numbers show fewer total placements this month, but a higher share of those placements landing in the rank-one slot.

Highest-priority diagnostic: Which surfaces are driving Armani Beauty's rank-one gains, and is this concentration stable or surface-specific?

Buyer-Intent Interpretation

In September 2026, all 631 qualified observations fell into the Brand Recommendation cluster, with none captured in the Pricing & Value or Multi-Brand Comparison clusters. The benchmark therefore captures how AI surfaces prestige makeup brands in recommendation contexts, but cannot yet answer questions about how AI positions these brands on price, value, or direct head-to-head comparison. Within that cluster, 47.5% of observations were recommendation-shaped answers in September 2026, up from 40.9% in August 2026.

Brand Opportunity Summary

The benchmark identifies where attention is warranted; a company-level analysis is needed to explain why.

Evidence Behind the Benchmark

The aggregate metrics are built from prompt-level observations capturing the query, the AI surface used, the recommendation outcome, the rank of each mentioned brand, the sentiment expressed, and citations where exposed. Company-level analysis can go deeper into prompt, competitor, surface, and evidence patterns to explain the movements this benchmark identifies. Source presence is not automatically treated as proof of causation.

About This Benchmark

This report is part of the LLM Authority Index AI Market Discovery research program.

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Report-Specific Interpretation Notes

• The qualified benchmark set (631 observations in September 2026) is smaller than the raw collection universe (800 prompts) because only prompts that pass relevance and eligibility stages are used for brand-level percentages.
• NARS Cosmetics' 5.4-point decline is the only movement classified as significant this month; all other brand movements fall within normal month-to-month variation for this category's observation counts.
• Directional analysis identifies where AI recommendation patterns shifted; it does not establish why those shifts occurred. Movement warrants investigation, not conclusion.

Next Step

The Public Benchmark Shows Where a Brand Is Winning or Losing. A Company-Level Audit Shows Why.

Beneath the aggregate percentage sits a more actionable set of questions: which high-intent prompts a brand wins, which competitor takes the recommendation when a brand loses, what attributes AI associates with each option, and which external sources shape those answers. For NARS Cosmetics' decline or Hourglass Cosmetics' rise, the public benchmark identifies the movement, but only a prompt-level examination can explain which surface, which competitor, and which evidence source drove it.

A company-specific AI visibility audit maps those prompt, surface, competitor, ranking, sentiment, and evidence-source patterns into a prioritized visibility strategy. Where the benchmark shows movement, the audit reveals the mechanism.

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