On March 5, OpenAI replaced GPT-5.2 with GPT-5.4 as the default model in ChatGPT. Not a quiet upgrade. A full swap. GPT-5.2 Thinking is already legacy. It retires completely on June 5, 2026. We track how AI models describe brands across 500M+ conversations. Every time a model changes, we watch citation share, sentiment, and visibility scores shift in real time. Sometimes gradually. Sometimes overnight. GPT-5.4 is an overnight one. Here’s...
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