GPT-5 Pro

The ultimate thinking machine for problems that demand maximum intelligence and computational effort. GPT-5 Pro allocates massive compute resources to think deeply and thoroughly about the hardest challenges. With an extraordinary 272K output window and extensive thinking capabilities, this model tackles problems other AIs simply cannot solve. Requests may take minutes to complete as it works through complex reasoning chains. For cutting-edge research, groundbreaking problem-solving, and situations where correctness is paramount and time is secondary.