According to OpenAI (@OpenAI), ChatGPT users with Plus, Pro, and Business subscriptions can now customize GPT-5's thinking time directly in the web interface. This new feature allows users to toggle between different thinking speeds—Standard (the new default), Extended (the previous default for Plus), Light (fastest, exclusive to Pro), and Heavy (deepest, exclusive to Pro)—for optimal balance between response speed and output depth (source: OpenAI Twitter, Sep 17, 2025). This update directly addresses user feedback regarding response delays, enabling businesses and professionals to optimize productivity and workflow efficiency. The persistent setting ensures a consistent user experience across sessions, enhancing ChatGPT’s value as a business-ready AI productivity tool.