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in this run: openai, anthropic, deepseek, grok, perplexity, kimi, google. The configured source value 7 is provenance only and must never be described as the number of platforms studied.","The finalrankingtable is the sole authority for rank, platform mentions, platform share, average rank, and best rank. Ignore any conflicting value embedded in a entity evidence bundle.","The Consensus Ranking table must contain exactly one row per finalrankingtable entity, in that order, using that exact entityname. Never split one ranked entity into two product, model, SKU, or product-line rows, and never add another ranking row for a brand already listed. Put recommended products or plans inside that entity's ranked section.","Platform mentions count only ranking-discovery mentions. Do not substitute the number of platforms that later completed a fit assessment.","Citation IDs inside each entity bundle are local to that entity. Consolidate sources by URL using the supplied source catalog.","The URLs were collected from platform responses and were not independently validated by either writer stage.","Each fitreviewurlorplaceholder is the final site-relative CMS path for that entity's review. Link the entity name to that exact path exactly once in its ranked prose section, outside tables and headings. Never replace it with a run ID, report ID, UUID, or local output path.","Use the exact entity-namespaced citation IDs from the source catalog (e.g. e1:); never transfer a citation between entities."],"methodology":{"fit_rating_contract":["strong","good","mixed","weak","uncertain"],"included_valid_platform_count":7,"maximum_finalists":10,"minimum_mentions":2,"name":"Aging in Place Index cross-platform AI consensus analysis","platforms_included":["anthropic","deepseek","google","grok","kimi","openai","perplexity"],"platforms_queried":["openai","anthropic","deepseek","grok","perplexity","kimi","google"],"stages":["ranking_discovery","fit_assessment","normalization","editorial_synthesis"],"version":"alias-table-1"},"provenance":{"generated_at":"2026-09-27 20:50:57.263614+00","research_date":"2026-09-27","source_snapshot_sha256":"33232e9818aeb403574065c0f1a622d8dec8d132656ac469a1b6347ba1f04d10","verification_scope":"public_verification"},"ranking":{"candidates_evaluated":23,"qualified_finalists":6,"ranking_unit":"Luxury walk-in tub model and manufacturer"},"schema_version":4,"summary":"Ella's Bubbles leads the September 2026 consensus ranking for Premium Spa & Comfort Features, followed by American Standard Acrylic Luxury Series 28x48 Walk-In Tub and Kohler Walk-In Bath. The current study includes 7 valid AI-platform responses and 6 qualifying entities. Compared with August 2026, the leader changed. The current list added American Standard Acrylic Luxury Series 28x48 Walk-In Tub and ANZZI AZ2853-PRX Premier Walk-In Therapeutic Tub and removed American Standard Walk-In Baths - Luxury configuration, Meditub, and Independent Home. This is an immediately preceding-month…","target_buyer":"Homeowners willing to pay more for premium therapy features, high-end fixtures, comfort upgrades, and a polished bathroom finish","topic":{"base_category":"Walk-in tubs","category_criteria":["Hydrotherapy and air jet combination","chromotherapy","aromatherapy","premium fixtures","heated surfaces","design finish options","warranty coverage","installed price"],"geography":"United States","slug":"best-luxury-walk-in-tubs","title":"Best Luxury Walk-In Tubs","use_case":"Premium Spa & Comfort Features"}}