OpenAI launches GPT 5.1 with warmer tone, adaptive reasoning, and new personalities.
Two new models named Instant and Thinking promise clearer answers, stronger math and coding results, and more control over ChatGPT’s style.
OpenAI has released GPT 5.1 for ChatGPT users, focusing on natural conversation, better reasoning, and easier personalization for everyday use. The update follows standard news priorities by addressing who, what, when, where, why, and how at the start, then adding details that matter to readers. The structure keeps the most important points first so general readers can get the key facts quickly.
The company introduced two choices named GPT 5.1 Instant and GPT 5.1 Thinking. Instant aims to keep chats fast and friendly while deciding when it should think more for harder questions, which helps with accuracy on math and code tasks. Thinking adapts its effort to the difficulty of the prompt, moving faster on simple requests and spending longer on complex ones for clearer, more useful answers.
OpenAI says the new release improves instruction following, which means it is better at following exact directions from users. This change helps with tasks like writing in a set number of words, sticking to specific formats, or handling step by step procedures. Readers can expect fewer confusing terms and clearer explanations in technical answers.
Personalization now gives users more control over tone and style. The service adds a set of preset personalities, and it lets people adjust how concise, warm, or expressive replies should be, including how often emojis appear. These settings can be updated during a chat to match user preferences more closely.
The rollout starts with paid plans, then opens to more users and developers over time. The goal is a smoother transition, with legacy versions staying available for a while so teams can test and switch when ready. This approach follows common newsroom guidance to present clear leads, short paragraphs, and organized details for quick reading.
