OpenAI has unveiled GPT-5, a new AI system that builds on the reasoning advances of the o1 and o3 models and unifies every previous model line into a single adaptive architecture. According to the company, this design lets the system adjust its "thinking effort" to the complexity of each task, aiming for more reliable and accurate responses. Access to GPT-5 depends on your subscription tier. For the first time, free users can try a model designed for logical reasoning, while paying customers get...