GPT-5 Now Default Model in ChatGPT | Multi AI
OpenAI has made GPT-5 the new default model in ChatGPT, replacing GPT-4o and other legacy models. This significant update, effective February 2026, brings enhanced performance, reduced hallucinations, and improved instruction following to all users. Discover what this change means for your AI interactions and how GPT-5 is setting a new standard for conversational AI.