ChatGPT “Core Updates” Are Here: What GPT-5.5 Citation Shifts Mean For Your SEO, Content, And Revenue
SISTRIX data suggests GPT-5.5 coincided with major changes in which sites ChatGPT cites—more local-language publishers and service brands, fewer global aggregators, and an even bigger role for Reddit. Here’s what changed, why it matters, and a practical playbook to win AI citations without guessing.