GPT-5.5

1. In high-risk fields (healthcare, law, etc.), the model's "hallucinations" (misinformation) are reduced by a significant 52.5% compared to previous generations. Mathematical reasoning (AIME 2025 score of 81.2) and scientific reasoning (GPQA score of 85.6%) capabilities are substantially enhanced, leading to more reliable decision-making.
2. The model intelligently references your conversation history, local files, and Gmail emails, combining long-term context to deliver customized responses. The newly added "Memory Sources" visualization feature lets you view, edit, or delete referenced memories at any time, offering more transparent privacy control.
3. The reply style is more concise, using 30.2% fewer words and 29.2% fewer lines, delivering higher information density. The tone is also more natural and pragmatic, aligning with workplace communication norms, while doing away with excessive formatting and redundant emojis.

1. Programmers, researchers, data analysts, and others can use the model's strong programming, mathematical reasoning (AIME 2025 score of 81.2), and scientific analysis (GPQA score of 85.6%) capabilities to handle complex technical tasks and solve real-world problems end-to-end.
2. Enterprises and institutions can use it for automated office tasks, batch processing, and high-reliability scenarios, such as reviewing tens of thousands of pages of tax forms, automatically generating business reports, and applications in healthcare and law, where a 52.5% reduction in hallucination rate earns it significant trust.
3. Regular individual users can access the basic GPT-5.5 Instant for free, experiencing lower hallucination rates and more concise replies; paid users (Plus/Pro) can further enjoy personalized contextual features such as accessing historical files and emails.
4. Specific industries and vertical scenarios include high-reliability assistance in law, finance, and healthcare, a dedicated cybersecurity version (GPT-5.5-Cyber), as well as educational tutoring and interdisciplinary research (benefiting from multimodal reasoning with an MMMU-Pro score of 76.0).