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LLMrefs Blog
Insights, guides, and updates on AI search optimization and how to improve your brand visibility in AI-powered search engines.
Latest Posts
February 9, 2026
ChatGPT Entities and AI Knowledge Panels
ChatGPT now turns brands into clickable entities with knowledge panels. Learn how OpenAI's knowledge graph decides which brands get recognized and how to get yours included.
February 5, 2026
What are zero-click searches? How AI stole your traffic
Over 80% of searches in 2026 end without a click. Users get answers from AI Overviews or skip Google for ChatGPT. Learn what zero-click means and why CTR metrics no longer work.
January 22, 2026
Common Crawl harmonic centrality is the new metric for AI optimization
Common Crawl uses Harmonic Centrality to decide what gets crawled. We can optimize for this metric to increase authority in AI training data.
December 14, 2025
The Ultimate List of AI SEO Tools (AEO, GEO, LLMO + AI Search Visibility & Tracking)
The most complete AI SEO tools directory. 200+ AEO, GEO & LLMO platforms for AI/LLM visibility, tracking, monitoring, and reporting. Updated Jan 2026.
December 13, 2025
How ChatGPT memory works, reverse engineered
Reverse engineering ChatGPT Memories reveals it does not use RAG or vector databases. It uses: metadata, facts, conversation summaries, and a sliding window.
December 10, 2025
33 key terms you need to know for AI SEO in 2026
Comprehensive glossary of 33 essential terms for AI SEO in 2026. From GEO and AEO to citations and fan-out queries, learn the vocabulary that defines modern search optimization.
December 8, 2025
AI assistants are not search engines
We analyzed 4.5M ChatGPT conversations. Two thirds have zero commercial intent. People use AI to think, not to shop. Here is what that means for your content strategy.
December 3, 2025
Why off-site SEO matters in GEO & AI search
Generative answer engines discover pages through traditional search results. This makes off-page SEO your best lever for visibility in ChatGPT and other AI search platforms.
December 2, 2025
OpenAI declares "code red" as Google catches up in AI race
Sam Altman has declared a "code red" at OpenAI as Google's Gemini closes the gap. Learn what this means for ChatGPT, AI search, and the future of the AI race.
November 26, 2025
OpenAI is quietly building a hidden cached index for ChatGPT Search
OpenAI maintains a hidden cached index of webpages and search grounding results for ChatGPT web search. How to test if your pages are indexed using the Web Search API.
November 14, 2025
How ChatGPT reads your content and sees the web
GPT does not browse web pages like humans do. It receives small snippets through a windowed retrieval system. How web search, expansions, and context sizes actually work.
November 10, 2025
CiteMET grows your LLM traffic with AI share URL buttons
CiteMET is a AI SEO method to grow your LLM traffic & visibility in AI search engines with dynamic AI share URL buttons
October 15, 2025
Help AI bots understand your content with the LLM Only React Component
AI search engine crawlers (like ChatGPT) cannot view dynamic web content. LLM Only is an open source React component that helps AI bots understand your content.
October 10, 2025
Microsoft's AI SEO visibility content optimization guide
Microsoft Bing guidelines on how to optimize your content for increased AI search citations and visibility.
October 7, 2025
ChatGPT Apps SDK for SEOs and developers
ChatGPT Apps SDK announced at OpenAI DevDay 2025. Learn how to optimize for AI search where apps live inside ChatGPT.
September 10, 2025
The 10 best AI SEO tools in 2026
A hands-on guide to the 10 best AI SEO tools for 2026. Practical reviews covering AI visibility tracking, content optimization, and traditional SEO platforms with AI features.
July 1, 2025
Cloudflare blocks AI bots & crawlers by default
Cloudflare now blocks AI bots & AI crawlers on all new websites by default. Learn what this means for AI search visibility, how to configure your settings, and whether you should opt out.
June 29, 2025
We leaked the ChatGPT-4o System Prompt 2025
LLMrefs leaked the system prompt behind ChatGPT-4o. We discovered that ChatGPT has no search index, why it triggers web search and how it queries the web.
June 25, 2025
Everything YouTube taught me about AI search
I binge-watched every AI SEO video on YouTube. Everything I learnt about GEO, AEO, LLMO and how to rank in AI search engines.
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