OpenAI Releases GPT-5.1 Update for ChatGPT

OpenAI unveiled an update to its flagship AI model on Wednesday, releasing GPT-5.1 to enhance the capabilities of its ChatGPT chatbot. The upgrade, which began rolling out immediately to paid subscribers, introduces improvements in intelligence, conversation style, and user customization, aiming to create a more engaging and adaptable experience.

According to the company, GPT-5.1 builds on the previous GPT-5 model with two primary variants: GPT-5.1 Instant and GPT-5.1 Thinking. The Instant version, expected to be the most commonly used, is designed to deliver warmer, more playful responses while being more intelligent and precise in following user instructions. OpenAI stated that testing feedback highlighted users' surprise at its enhanced playfulness. The Thinking variant focuses on advanced reasoning, providing faster responses for simple tasks and more persistent analysis for complex ones. It also produces clearer explanations with reduced jargon and undefined terms, and incorporates a warmer, more empathetic tone.

A key aspect of the update is expanded personalization options. Users can now select from additional conversation styles, including Professional, Candid, and...