AI RESEARCH
OpenAI GPT-5 System Card
arXiv CS.CL
•
ArXi:2601.03267v2 Announce Type: replace This is the system card published alongside the OpenAI GPT-5 launch, August 2025. GPT-5 is a unified system with a smart and fast model that answers most questions, a deeper reasoning model for harder problems, and a real-time router that quickly decides which model to use based on conversation type, complexity, tool needs, and explicit intent (for example, if you say 'think hard about this' in the prompt