How AI Search Is Recommending Walk-in Tubs: Monthly Trends

Executive Summary

Kohler remains the coverage leader in October 2026 at 52.0% of qualified observations, holding first place for the fourth consecutive measured month. The gap to the next brand, American Standard at 51.2%, has closed to 0.8 points, down from 5.6 points in September 2026. The top of the category is now a near-tie rather than a settled lead.

Universal Tubs (Spa World (SWCORP) is the strongest upward mover in October 2026, rising to 12.1% valid recommendation coverage from 5.2% in July 2026, a significant 6.9-point gain. The brand's recommended top-three rate rose to 4.7% from 1.4% at baseline and its rank-one rate to 2.1% from 0.3%, both significant. It is the only tracked brand to post a significant coverage gain across the series.

Ella's Bubbles recorded the sharpest decline among the significant decliners, falling from 44.7% in July 2026 to 35.7% in October 2026, a significant 9.0-point drop. Safe Step fell 9.0 points to 32.6% and Meditub Spa World (SWCORP) fell 2.2 points to 0.8%, both significant. Kohler's own significant baseline decline, down 10.5 points from 62.5%, was almost entirely set in prior months; its month-over-month move was a non-significant 0.2 points.

Against September 2026, American Standard gained 4.6 points and Universal Tubs gained 5.8 points, the two largest prior-to-current moves, while Boca Walk-In Tubs fell 1.5 points, a significant decline. The category was mixed: five brands stable, four significant decliners, one significant riser.

Each monthly run begins with 700 prompt-surface observations (529 unique questions) in October 2026, against 800 prompt-surface observations (488 unique questions) in July 2026. Of the October 2026 runs, 700 mentioned a tracked brand or competitor; 470 were relevant and 230 were irrelevant. The public metrics use the 381 qualified observations in October 2026 that survive both qualification stages, against 365 in July 2026, 372 in August 2026, and 412 in September 2026.

Key Findings

AI Response Inconsistency Alerts

Questions This Section Answers

• Which platforms gave conflicting answers about Jacuzzi's walk-in tub availability?
• Where did AI platforms disagree most about Safe Step installation costs?
• Which brands had conflicting answers on pricing, ratings, or warranty terms?

AI platforms produced 12 critical or high-severity factual inconsistencies across five platforms in the current measurement window: ChatGPT, Copilot, Gemini, Google AI Mode, and Google AI Overviews. Each is a case where two platforms gave incompatible answers to the same question.

Jacuzzi

Critical: availability of walk-in tubs. When asked "Does Jacuzzi offer a walk-in tub?", ChatGPT stated that Jacuzzi currently offers walk-in tubs, citing a "Walk-In Tubs & Showers" section on the company's own site (jacuzzi.com). Copilot stated the opposite: that Jacuzzi discontinued walk-in tubs as of 2026 and no longer sells them directly, citing retirementliving.com, aginginplacefunding.com, and caring.com. The conflict is flagged at full confidence, with retirementliving.com carrying the excerpt "JACUZZI NO LONGER OFFERS WALK-IN TUBS."

Critical: availability of walk-in tubs (second instance). The same question produced the same conflict against a different platform. ChatGPT's claim on jacuzzi.com stands against Gemini's statement that Jacuzzi no longer manufactures or offers walk-in tubs and that production has been phased out. Gemini cited retirementliving.com, kohlerwalkinbath.com, and homedepot.com. Again the retirementliving.com source carries the "no longer offers" excerpt at 0.95 confidence.

Safe Step

High: installation cost. When asked "What is the average cost of a safe step walk-in tub?", ChatGPT stated installation costs about $8,000 to $12,000 on average, citing safesteptub.com's cost guide. Gemini stated that standard installation generally adds $1,500 to $5,000, citing safesteptub.com, modernize.com, and bestcompany.com. The ranges do not overlap.

High: average installed cost. When asked "What is the average cost for a safe step tub?", Gemini stated the typical range is $10,000 to $26,000 fully installed, citing safesteptub.com and bestcompany.com, while Copilot stated the total investment often falls between $6,000 and $11,000, citing Home Depot product pages. Three flagged sources carry the $10,000 to $26,000 claim, including safesteptub.com at full confidence.

High: installation cost (second instance). When asked "How much does a safe step walk-in tub actually cost?", Gemini stated professional installation usually adds $1,500 to $5,000 or more, citing bestcompany.com, modernize.com, and seniorliving.org, while Google AI Overviews stated full-service installation often starts around $5,000 to $8,000, citing safesteptub.com and bestcompany.com. The flagged modernize.com source carries a "$1,000 to $5,000+" excerpt.

High: installed cost range. When asked "How much does a Safe Step walk-in tub cost?", ChatGPT stated typically about $10,000 to $20,000 or more installed, while Copilot stated typically between $5,000 and $15,000 installed. The flagged safesteptub.com pricing page carries the $10,000 to $26,000 claim at 0.95 confidence, and homebuddy.com carries the $5,000 to $15,000 claim at 0.95 confidence.

High: installed cost range (second instance). When asked "What is the approximate cost of a safe step walk-in tub?", Gemini stated typically $10,000 to $26,000 installed, citing safesteptub.com and bestcompany.com, while Copilot stated typically $5,000 to $15,000 installed. Three flagged sources carry the higher claim, with safesteptub.com again at 0.98 confidence.

Kohler

High: customer rating. When asked "What is the best rated walk-in tub with shower?", ChatGPT stated that Kohler Walk-In Bath is not given a numeric rating and that Safe Step is described as having the highest customer rating at 4.8 out of 5, citing ncoa.org, kohlerwalkinbath.com, and consumeraffairs.com. Copilot stated that Kohler Walk-In Bath is rated 4.9 out of 5 and is the highest-rated option, citing thisoldhouse.com, retirementliving.com, and theseniorlist.com. Two flagged sources carry conflicting rating tables, one placing Safe Step above Kohler and the other placing Kohler first.

High: average installed cost. When asked "What is the average cost of a KOHLER Walk-In Bath?", ChatGPT stated roughly $10,000 to $15,000 installed, citing Kohler's own pricing and installation pages, while Google AI Mode stated $4,000 to $12,000 for standard models including professional installation, citing theseniorlist.com, caring.com, and consumeraffairs.com.

High: warranty length. When asked "What toilet is better, American Standard or Kohler?", ChatGPT stated Kohler offers lifetime coverage on vitreous china with mechanical coverage varying by model, often 5 or 10 years, while Google AI Overviews stated Kohler typically offers a 1-year limited warranty. The flagged callhometherapist.com source carries the "both lifetime-warranty brands" excerpt.

American Standard

High: installed cost. When asked "Who has the best price on walk-in tubs?", Gemini stated American Standard installed cost is often $8,000 to $13,000, citing modernize.com, while Copilot stated $6,000 to $9,000, citing Home Depot product pages. The flagged ageinplaceguide.com source carries a $6,000 to $9,000 installed excerpt for the American Standard Liberation 2848.

Universal Tubs (Spa World (SWCORP)

High: entry-level price. When asked "Who has the best price on walk-in tubs?", ChatGPT stated the lowest Universal Tubs model is about $2,839, citing homedepot.com, consumeraffairs.com, and seniorliving.org, while Copilot stated entry-level Universal Tubs models start around $1,996 to $2,299, citing Home Depot product pages.

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.

The intermediate months carried 372 qualified observations in August 2026 and 412 in September 2026. The October 2026 qualified base of 381 sits between the August and September levels. Qualified surface breadth fell from 6 to 5 canonical families in October 2026; the benchmark's platform list for the month does not include Perplexity.

Benchmark-Level Metrics

The recommendation-shaped answer share reached its highest level in October 2026 across the series, after falling to 29.3% in August 2026 and recovering to 35.4% in September 2026. The shortlist share held close to its July 2026 level across the same period.

AI Recommendation Trend

Questions This Section Answers

• How narrow is the gap between the top two brands in October 2026?
• Which brand broke away from the low-coverage group this month?
• Which walk-in tub brands lost the most recommendation coverage since July 2026?

A Near-Tie at the Top While One Brand Breaks Away From the Low-Coverage Pack

The leader's margin has compressed to 0.8 points, the narrowest of the series, while Universal Tubs (Spa World (SWCORP) has separated itself from the near-zero coverage group.

Universal Tubs (Spa World (SWCORP) exceeded normal month-to-month variation on both the baseline-to-current and prior-to-current comparisons, the only brand to do so this month. The category-level picture came from the combination of several smaller movements, most notably American Standard's recovery toward the leader, alongside continued declines among the three brands directly beneath it.

What Changed This Month

Questions This Section Answers

• Did Kohler's month-over-month coverage change this month, or is the decline an earlier shift?
• How did American Standard close the leader gap despite a lower baseline decline?
• Why did Ella's Bubbles and Safe Step reach similar coverage levels through different month shapes?

Kohler: Leader Intact, Margin Compressed

Kohler's valid recommendation coverage stands at 52.0% in October 2026 against 62.5% in July 2026, a significant 10.5-point decline across the series. The month-to-month picture is quiet: coverage moved from 52.2% in September 2026 to 52.0%, a non-significant 0.2-point change.

Raw mention presence held at 94.5% in October 2026, down from 96.4% in July 2026. Its recommended top-three rate stood at 44.1% against 44.7% at baseline, and its rank-one rate rose from 22.2% to 23.6%, neither significant. Valid recommendation count was 198 in October 2026, against 228 in July 2026.

The distinction to notice is that Kohler's recommendation depth is holding at the top of lists even as its overall coverage sits well below its July 2026 level. The entire 10.5-point decline was set in the July-to-August transition, when coverage fell 10.4 points; the brand has been essentially flat since.

Highest-priority diagnostic: Whether the leader's compressed margin reflects a genuine closing by American Standard or a reweighting of the underlying prompt mix.

American Standard: Closing the Leader Gap

American Standard's coverage stands at 51.2% in October 2026, down 6.3 points from 57.5% in July 2026 but up 4.6 points from September 2026. The baseline decline is below the significance threshold, unlike the four significant decliners.

Its recommended top-three rate rose from 32.3% to 38.1% across the series, and its rank-one rate from 2.5% to 4.5%, neither significant. Raw mention presence was 90.3% in October 2026 against 90.7% in July 2026, effectively unchanged. Valid recommendation count was 195 in October 2026 against 210 at baseline.

The distinction is between stable presence and improving placement. American Standard's mention rate barely moved, but it now reaches the top three of recommendation lists more often than at baseline, which is where the gap to the leader closed.

Highest-priority diagnostic: Whether the top-three improvement is concentrated in the same prompt types where Kohler lost recommendation depth.

Ella's Bubbles and Safe Step: Two Equal Baseline Declines, Different Mechanisms

Ella's Bubbles fell from 44.7% coverage in July 2026 to 35.7% in October 2026, a significant 9.0-point decline, though it recovered 3.2 points from September 2026. Safe Step fell from 41.6% to 32.6%, also a significant 9.0-point decline, and moved down 0.4 points from September 2026.

For Ella's Bubbles, raw mention presence fell from 61.6% to 48.6%, a significant 13.0-point drop, while its top-three rate moved from 35.1% to 30.7% and its rank-one rate from 22.7% to 20.2%, neither significant. Valid recommendation count fell from 163 in July 2026 to 136 in October 2026.

For Safe Step, raw mention presence fell from 68.0% to 54.1%, a significant 13.9-point drop, with a three-month downward streak in coverage. Its top-three rate moved from 28.8% to 26.2% and its rank-one rate rose from 3.3% to 5.0%, neither significant. Valid recommendation count fell from 152 in July 2026 to 124 in October 2026.

The distinction for both brands is that the visible-presence layer moved more than the placement layer. Each brand is mentioned in significantly fewer answers than at baseline while its position within the lists it still appears in has changed less. The two brands arrive at comparable coverage levels through different month shapes: Ella's Bubbles is recovering from a sharp September low, while Safe Step has declined for three consecutive months.

Highest-priority diagnostic: Which prompt types no longer mention these brands at all, and whether the same prompts now surface Universal Tubs (Spa World (SWCORP).

Universal Tubs (Spa World (SWCORP): The Category's Single Significant Riser

Universal Tubs (Spa World (SWCORP) rose from 5.2% coverage in July 2026 to 12.1% in October 2026, a significant 6.9-point gain, and up 5.8 points from September 2026, also significant. It is the only significant riser in the category and has now risen for two consecutive months.

Its recommended top-three rate rose from 1.4% to 4.7% and its rank-one rate from 0.3% to 2.1%, both significant. Raw mention presence moved from 15.3% to 20.0%, a non-significant gain. Valid recommendation count rose from 19 in July 2026 to 46 in October 2026.

The distinction is that Universal Tubs is converting a modest presence gain into a larger recommendation gain. Its mention rate grew by less than its coverage rate, meaning it is being placed into lists more often when it does appear. The three notable gaps in the series context all involve Universal Tubs as the closing brand: its coverage deficit against Kohler narrowed by 17.4 points across the series, against Ella's Bubbles by 15.9 points, and against Safe Step by 15.9 points, each gap narrowing every month.

Highest-priority diagnostic: Which surfaces and prompt types drive the placement gain, and whether the gain is concentrated in the surface where the company holds platform-level authority.

Meditub Spa World (SWCORP): Below One Percent

Meditub Spa World (SWCORP) stands at 0.8% coverage in October 2026, down 2.2 points from 3.0% in July 2026, a significant decline, though up 0.8 points from September 2026 when it recorded zero valid recommendations. Raw mention presence fell from 8.5% to 3.4%, also significant. Valid recommendation count was 3 in October 2026, against 11 in July 2026.

Its sibling brand, Universal Tubs (Spa World (SWCORP), moved in the opposite direction over the same period, rising to 12.1%. The divergence between the two related product lines is a category observation about how AI systems allocate recommendations between closely linked brands.

Highest-priority diagnostic: Whether Meditub mentions are being folded into Universal Tubs recommendations, and which prompts still surface the Meditub name without recommending it.

Boca Walk-In Tubs: A Single-Observation Month

Boca Walk-In Tubs fell from 1.5% coverage in September 2026 to 0.0% in October 2026, a significant 1.5-point prior-to-current decline, against 0.8% in July 2026. Raw mention presence was 1.3% in October 2026, with 5 observations, and valid recommendation count was 0. The brand's coverage moved to and from zero across the series multiple times.

The counts are small: a single observation changes this brand's rate materially. The movement is worth noting but not comparable in weight to moves in the higher-coverage tier.

Highest-priority diagnostic: Which specific query types produce the brand's rare appearances, since each one carries outsized weight in its rate.

Buyer-Intent Interpretation

Questions This Section Answers

• What kinds of buyer questions do the qualified observations actually capture?
• Can the public benchmark answer pricing or head-to-head comparison questions yet?

All 381 qualified observations in October 2026 fell into the brand recommendation cluster. The pricing and value and multi-brand comparison clusters captured zero qualified observations, matching the pattern across the July-to-October series. The public benchmark measures which brands AI systems surface and recommend in discovery-oriented queries, but it cannot yet answer price, value, or head-to-head comparison questions from the qualified set, even though the inconsistency data above shows that AI platforms are answering pricing and comparison questions with materially conflicting figures outside the qualified benchmark set.

Brand Opportunity Summary

Questions This Section Answers

• Which walk-in tub brands need the most diagnostic attention based on October 2026 coverage?
• What is the highest-priority question to investigate for each brand?

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 (query, surface, recommendation outcome, rank, sentiment, and citations where exposed). Company-level analysis can go deeper into prompt, competitor, surface, and evidence patterns. Source presence is not automatically treated as proof of causation.

About This Benchmark

This report is part of the CiteWorks Studio AI Visibility Industry Market research program.

• AI Visibility Industry Market Methodology
• AI Visibility Industry Market Metrics
• AI Visibility Industry Market Standards

Report-Specific Interpretation Notes

• Small-count movement: brands with fewer than 5 valid recommendations in a month, including American Tubs, Independent Home, Boca Walk-In Tubs, and Meditub Spa World (SWCORP), can move to or from zero based on a single observation. Boca Walk-In Tubs recorded 5 observations and 0 valid recommendations in October 2026.
• Qualified denominator versus raw collection: percentages are calculated against the 381 qualified observations in October 2026, not the 700 raw prompt-surface runs. The qualified base fell from 412 in September 2026 to 381 in October 2026.
• Qualified surface breadth: October 2026 carried 5 canonical AI surface families with at least one qualified observation, down from 6 across the earlier months of the series.
• Directional analysis: baseline-to-current movement identifies changes worth investigating; it does not by itself establish the cause of those changes, particularly where the qualified observation base and surface mix shifted across the series.

Next Step

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

Beneath the aggregate percentages sit the questions that determine commercial outcome: which high-intent prompts a brand wins or loses, which competitor takes the recommendation when a brand drops off a list, what attributes AI systems associate with each option, and which external sources shape those answers. This month's data adds a second layer: platforms gave materially conflicting answers on availability, pricing, ratings, and warranty terms for Jacuzzi, Safe Step, Kohler, American Standard, and Universal Tubs (Spa World (SWCORP), which means the answers a buyer receives depend on which surface they ask.

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

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