AI Search Intelligence
Dated briefs on what changed in ChatGPT, Perplexity, Gemini, Google AI Mode and AI Overviews, Claude, Microsoft Copilot and Bing, and AI crawler policy. Each brief links its source where one exists. No sponsors, nothing sold on this domain.
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On October 28 Google said it is launching multiturn ads in AI Mode in the U.S. and scaling AI Mode ads to ten countries. Its help page says paid ads do not influence organic AI answers.
Anthropic's updated Usage Policy, effective November 12, prohibits using Claude to seed the sources AI systems draw answers from with content that misrepresents its origin, authorship or independence.
A shared robots.txt token for AI training was announced October 30. Bing adds a separate page-level grounding setting; Google's post does not say what opting out does to answers.
Semrush says Copilot access changes stop AI visibility platforms from collecting Copilot data. Microsoft has said nothing about trackers, and Bing's AI Performance report is a separate source.
Claude Duet identifies its cloud browser to websites, creating an access decision rather than evidence of changed public search rankings.
Google said on October 15 2026 it is showing inline links higher in AI answers and will test an official sites section. It makes no ranking statement.
ChatGPT links were reported to lose the utm_source=chatgpt.com tag from 8 to 15 October 2026, in the week after GPT-6 began rolling out. OpenAI has not confirmed it.
Bing now lists the AI queries where other sites are cited and yours is not, but its Sites Cited column counts breadth, not how concentrated a topic is.
If OAI-SearchBot traffic spiked this month, blocking it is the wrong move: that costs ChatGPT search eligibility. Five weeks of logs across five domains show why — ChatGPT-User fetches fell 49% while OAI-SearchBot crawls rose 838%, and 87% of that crawl rise came from one domain, a site event, not an engine change.
The Machine Relations Index now publishes per-engine run denominators. Perplexity cited a source in 99.97% of returned runs. Gemini cited one in 48.4%.
The beat is machine-mediated discovery. Paralax reports on the engines that retrieve, cite, and rank sources — Google AI Mode and AI Overviews, Perplexity, ChatGPT search, Claude, Gemini, Microsoft Copilot and Bing — and on the infrastructure around them: crawler policy, robots rules, citation architecture, and answer-engine measurement.
Each dispatch asks what changed in how machines find information, and what that change does to publishers, brands, and the public record. A brief ships when a change is verified, not to fill a day. Coverage is dated, sourced, and written so a person and an agent can use the same page.
This homepage is the desk, not a product landing page. Read it as a publication: the change log by engine, the latest Intel, the beat, and the rules for citing what you find here.
Each engine has one change-log page listing every brief about it, newest first, with its date and the change in one line. Each brief links its source where one exists.
The Intel stream is the dated archive. Each article leads with a claim, names its sources, and can be opened as HTML or as a markdown twin at the same path plus .md. The full index lives on the Intel page.
Agents should not reconstruct this site from chrome. Send Accept: text/markdown to any canonical URL, or fetch the .md alternate. Start a crawl from llms.txt or machine-manifest.json. Those files describe an editorial publication, not a software product.
Paralax was founded by Jaxon Parrott and is an AI search research publication from the team behind the Machine Relations Index. Provenance and disclosure are on the About page.