GPT-5.5 Instant Is Here: What Changed Inside ChatGPT’s New Default Model?
OpenAI has rolled out GPT-5.5 Instant as ChatGPT’s new default model, replacing GPT-5.3 Instant for users across ChatGPT. The company says the upgrade is designed to make everyday answers smarter, clearer, more concise and better adapted to what users are asking. That matters because the default model is what most people experience first, not the … Read more