OpenAI just dropped new o3 and o4-mini reasoning AI models - and a surprise agent

Following the recent launch of a new family of GPT-4.1 models, OpenAI released o3 and o4-mini on Wednesday, its latest addition to the existing line of reasoning models. The o3 model, previewed in December, is OpenAI's most advanced reasoning model to date, while o4-mini is a smaller, cheaper, and faster model. Simply put, reasoning models are trained to "think before they speak," which results in a longer time to process the prompt but higher-quality responses. However, they also have an important new addition: Visual understanding. Also: How to use ChatGPT: A beginner's guide to the most popular AI chatbot OpenAI o3 and o4-mini are OpenAI's first models to "think with images."