Responding to feedback that GPT-5’s more reasoning-focused “thinking” responses took too long, OpenAI has introduced new controls for how long the model deliberates before replying.
In the web version of ChatGPT, when you select “GPT-5 with Thinking,” a toggle appears giving four modes, Light, Standard, Extended, and Heavy, which trade off speed vs depth of response.
Plus and Business users have access to Standard and Extended, with Pro users getting all four options. The chosen setting persists across chats until changed manually.
