According to DeepLearning.AI, OpenAI has launched GPT-5 as a family of AI systems and made it the default model for ChatGPT. This release introduces a system that combines non-reasoning and variable-reasoning models, managed by an automatic router. The new architecture allows users to benefit from tailored AI responses depending on query complexity and intent. However, a routing glitch temporarily forced OpenAI to restore access to previous models. For AI businesses, this modular approach opens opportunities for adaptive AI solutions, improved cost efficiency, and enhanced user experience by matching model capabilities to specific business needs (source: DeepLearning.AI, August 15, 2025).