OpenAI releases new simulated reasoning models with full tool access

OpenAI has launched two new models, o3 and o4-mini, with enhanced reasoning abilities and access to various tools such as web browsing, coding, and visual analysis. These models replace the previous o1 and o3-mini versions and are initially available for paid ChatGPT users. Free users can try the o4-mini model via the "Think" option. The CEO has announced an upcoming release of o3-pro for pro tier users. Developers have access through APIs, with some models requiring verification. These new models offer improved efficiency and are designed for complex analysis (o3) and speed (o4-mini).