The System Card report released by OpenAI indicates that it is releasing a research preview of OpenAI GPT-4.5, which is its largest and most knowledgeable model to date. Building on the foundation of GPT - 4o, GPT-4.5 further expands pre-training and is designed to be more general than its powerful stem reasoning model. Early tests show that interacting with GPT-4.5 feels more natural. It has a broader knowledge base, aligns better with user intentions, has higher emotional intelligence, making it very suitable for tasks such as writing, programming and solving practical problems, and experiences fewer illusions.