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A case study with numbers and method, and guides on how ChatGPT, Gemini and other AI assistants decide whom to name.

Case studyDecember 202512 min read

Sereda.ai: what changed in ChatGPT and Gemini answers after the AI Page

Sereda.ai is a Ukrainian HR platform. Before the AI Page, ChatGPT said it did not know the product, and it hardly appeared in lists of HR tools. By early December both AI assistants described Sereda.ai accurately and named it in almost every list.

This is one case, not a promise of results: people scored the answers, and the AI assistants themselves may have been updated between measurements. The case was prepared together with the Sereda.ai team.

Total answer score5 criteria, 10 points each · average over 4 questions
ChatGPTwith search before ~12 after ~43of 50
Gemini before ~14 after ~45of 50

The AI Page was published on 22 October 2025. “Before” is September and early October, “after” is early December 2025. Two researchers scored the answers.

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What to read to get the full picture

GuideMay 2026 · 13 min Everything about llms.txt: the signals you can send to AI bots in 2026llms.txt, AI-bot rules in robots.txt, ai.txt and meta tags — and a table of which AI actually honours what. GuideDecember 2025 · 10 min From search to AI answers: how website visibility is changingOne AI answer instead of ten links. What changes in the rules, and where to start. ReviewDecember 2025 · 11 min Why a business needs a separate fact page for AIWhy an AI Page and llms.txt are becoming part of a website if you want AI to take accurate, current facts about you. ReviewDecember 2025 · 14 min How to measure whether AI mentions youHow ChatGPT, Claude and Gemini decide which brands to name, and why share of mentions is its own metric, not a Google position.

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