OpenAI has launched a new model, with some outlets specifying it as GPT-5.4, while others mention variations such as GPT-5.4-Cyber, GPT-5.4 Thinking and Pro, or even GPT-5.5. The model is reported to have various capabilities, including advanced cyber security features like reverse engineering and malware analysis. The launch is seen as a significant development, with some outlets discussing its potential impact on the fields of security and knowledge work.