AI Search Shake-Up: Practical SEO Moves for September 2026

  • ChatGPT crosses 1 billion active users (31 July 2026) and GPT-5.6 pricing cuts: Kraviona

  • Gemini surpasses 1 billion monthly active users (6 August 2026): AI Seek Guide

  • Global AI adoption figures (88% of organisations using AI in at least one function): Kraviona

  • Answer-first content structure and question-format headings for AI Overviews: HubSpot, CrawlVision, Search Engine Land — GEO guide

  • Schema markup citation stats (65–71% of AI Mode/ChatGPT citations carry structured data; 2.5x higher citation odds; 35% CTR lift): GoGoChimp, SiteUp.ai, Stackmatix

  • Google Search Console AI-visibility toggle and performance insights (UK pilot): Google Search blog

  • Core Web Vitals 2026 — INP replacing FID, only 55.9% of origins passing all three thresholds (May 2026 CrUX data): MonsterMegs, WebVitals.tools

  • Anthropic Claude Opus 5, Cognizant enterprise partnership, Model Hardware Standard preview: Anthropic Newsroom

  • OpenAI’s Astra model solves 10 long-standing unsolved math/CS problems for ~$2,000 in compute: Kraviona

  • Australia’s Office of AI announcement (14–15 July 2026): Reuters

  • National Cabinet agreement on national AI laws by early 2027 and data-centre standards (26 August 2026): Prime Minister of Australia

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AI Search Shake-Up: Practical SEO Moves for September 2026
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