{"@context":"https://schema.org","@type":"Blog","name":"Nicolas Sitter","url":"https://nicolassitter.com","author":{"@type":"Person","name":"Nicolas Sitter","url":"https://nicolassitter.com/about","sameAs":["https://www.linkedin.com/in/nicolassitternolleau/","https://github.com/Nicositter88","https://hotelrank.ai"]},"blogPosts":[{"@type":"BlogPosting","headline":"ChatGPT 5.3 Halved Its Hotel Sources — March 5, 2026 Cutover","description":"Daily ChatGPT UI runs of 140 world hotel prompts from 4 locales. On Mar 5, URLs per answer fell 49% (24→12). Booking −82%, Expedia −76%, Reddit −93%.","datePublished":"2026-04-17T00:00:00.000Z","url":"https://nicolassitter.com/research/chatgpt-hotel-source-shift-2026","category":"research"},{"@type":"BlogPosting","headline":"Hotel YouTube Channels — Activity Study 2026","description":"We analyzed YouTube channels linked from 9,889 hotel websites. 43.7% are ghost channels. Only 11.3% post monthly.","datePublished":"2026-04-16T00:00:00.000Z","url":"https://nicolassitter.com/research/youtube-hotel-visibility-2026","category":"research"},{"@type":"BlogPosting","headline":"ChatGPT Hotel Ads Are Live — Who Pays for Your Recommendations?","description":"Sponsored ads in 20-35% of hotel queries. Booking.com at 43.5%. We tracked 613 queries from Feb to April 2026.","datePublished":"2026-04-13T00:00:00.000Z","url":"https://nicolassitter.com/research/chatgpt-hotel-ads-live-2026","category":"research"},{"@type":"BlogPosting","headline":"ChatGPT Hotel Index vs Live Web — What Changes When Search Goes Offline","description":"400 hotel queries, 2 models, 2 search modes. 83% of cited domains differ between live and cached.","datePublished":"2026-04-09T00:00:00.000Z","url":"https://nicolassitter.com/research/chatgpt-hotel-index-vs-live-web-2026","category":"research"},{"@type":"BlogPosting","headline":"How Dirty Is Google Maps Hotel Data? 179K Study","description":"17% of Google Maps hotel listings fail QA. 8,167 OYO vacation rentals. Belgium loses 54% after cleaning.","datePublished":"2026-04-01T00:00:00.000Z","url":"https://nicolassitter.com/research/google-maps-hotel-data-quality-2026","category":"research"},{"@type":"BlogPosting","headline":"ChatGPT Hotel Data Sources: 100K Entity Study","description":"Google dropped from 100% to 70.3% in 90 days. TripAdvisor descriptions are 8.8x longer.","datePublished":"2026-03-24T00:00:00.000Z","url":"https://nicolassitter.com/research/tripadvisor-chatgpt-hotels-study-2026","category":"research"},{"@type":"BlogPosting","headline":"What Hotel Footers Reveal — 98K Study","description":"Instagram is in 40.8% of hotel footers. 24% of copyright years are 3+ years stale. 10% link to OTAs.","datePublished":"2026-03-23T00:00:00.000Z","url":"https://nicolassitter.com/research/hotel-footer-analysis-study-2026","category":"research"},{"@type":"BlogPosting","headline":"Hotel llms.txt Adoption Study 2026","description":"105,002 hotel websites scanned for llms.txt. Only 6.3% have one. US leads at 12.4%.","datePublished":"2026-03-21T00:00:00.000Z","url":"https://nicolassitter.com/research/hotel-llms-txt-adoption-study-2026","category":"research"},{"@type":"BlogPosting","headline":"Hotel robots.txt & AI Blocking Study 2026","description":"105,002 hotel robots.txt files parsed. Only 3.3% block any AI crawler. France leads at 7.5%.","datePublished":"2026-03-20T00:00:00.000Z","url":"https://nicolassitter.com/research/hotel-robots-ai-blocking-study-2026","category":"research"},{"@type":"BlogPosting","headline":"What Hotels Are Actually Called: A Naming Study","description":"Analysis of naming conventions across 121,425 hotels in 7 countries","datePublished":"2026-03-10T00:00:00.000Z","url":"https://nicolassitter.com/research/hotel-naming-study-2026","category":"research"},{"@type":"BlogPosting","headline":"AI Hotel Direct Links Study 2026: Do Different Models Link Differently?","description":"API-level comparison of direct links across ChatGPT (5.1–5.4) and Gemini with web search enabled.","datePublished":"2026-03-10T00:00:00.000Z","url":"https://nicolassitter.com/research/ai-hotel-direct-links-study-2026","category":"research"},{"@type":"BlogPosting","headline":"Hotel Schema.org Adoption Study 2026","description":"121,425 hotels scanned — 36.3% have no schema at all","datePublished":"2026-03-05T00:00:00.000Z","url":"https://nicolassitter.com/research/hotel-schema-adoption-study-2026","category":"research"},{"@type":"BlogPosting","headline":"Anatomy of a ChatGPT Hotel Search","description":"12 systems, 7 providers, 424 A/B tests — a technical teardown","datePublished":"2026-03-01T00:00:00.000Z","url":"https://nicolassitter.com/research/anatomy-chatgpt-hotel-search-2026","category":"research"},{"@type":"BlogPosting","headline":"Yelp in ChatGPT: Hotel Data Study","description":"33% Yelp integration rate in US hotel queries across 14 destinations","datePublished":"2026-02-20T00:00:00.000Z","url":"https://nicolassitter.com/research/yelp-chatgpt-hotels-study-2026","category":"research"},{"@type":"BlogPosting","headline":"How Consistent Are AI Hotel Rankings?","description":"Only 50.5% position stability across query reruns","datePublished":"2026-02-15T00:00:00.000Z","url":"https://nicolassitter.com/research/ai-hotel-rankings-consistency-study-2026","category":"research"},{"@type":"BlogPosting","headline":"Google AI Mode: Where Do Hotel Clicks Actually Go?","description":"79% of hotel clicks in Google AI Mode go to Google Business Profiles","datePublished":"2026-02-10T00:00:00.000Z","url":"https://nicolassitter.com/research/google-ai-mode-hotel-study-2026","category":"research"},{"@type":"BlogPosting","headline":"GPT-5.1 to GPT-5.2: Which Hotels Won and Lost in the Model Update","description":"First documentation of how OpenAI model updates affect hotel visibility. Specific winners, losers, and patterns.","datePublished":"2026-02-09T00:00:00.000Z","url":"https://nicolassitter.com/research/gpt-5-1-to-5-2-model-changes-study-2026","category":"research"},{"@type":"BlogPosting","headline":"Do French Hotels Blog? A 15,000-Hotel Study","description":"49.3% have blogs but only 1 in 4 are active","datePublished":"2026-01-20T00:00:00.000Z","url":"https://nicolassitter.com/research/french-hotel-blog-study-2026","category":"research"},{"@type":"BlogPosting","headline":"The AI Hotel Landscape 2026","description":"How 6 AI Models Rank 12,500+ Hotels Across 1.2 Million Citations","datePublished":"2026-01-15T00:00:00.000Z","url":"https://nicolassitter.com/research/ai-hotel-landscape-2026","category":"research"}]}