OpenAI has officially launched GPT-5, delivering on their promise of "magic unified intelligence" that eliminates the model picker confusion. After extensive testing, this isn't just an incremental upgrade — it's a fundamental shift in how AI works. With chain-of-thought reasoning, 256K token context windows, and native video processing, GPT-5 automatically switches between quick responses and deep reasoning based on your needs. UK pricing starts at £16/month for Plus users, with enterprise features arriving via Microsoft integration. Our first-hand testing reveals game-changing implications for WordPress development, content creation, and UK businesses looking to leverage AI properly.