ZDNET's key takeaways OpenAI's GPT-5.1 includes two brand-new models. Users can also choose from new personalities. The updates are meant to make ChatGPT more personalized. OpenAI updated ChatGPT with its highly-anticipated GPT-5 model over the summer,

Back in August, OpenAI had introduced GPT-5, a significant frontier model update to ChatGPT. And now three months later, OpenAI

Sam Altman-led OpenAI is launching an upgraded version of ChatGPT, featuring personalisation features that allow users to adjust the chatbot's tone and style. The updated GPT-5.1 models, Instant and Thinking,

OpenAI is positioning GPT-5.1 as an upgrade that makes the conversational experience more enjoyable. The model now features a default setting that is distinctly “warmer” and more conversational. This change stems from direct user feedback,

OpenAI (OPENAI) has released ChatGPT 5.1, which features GPT-5.1 Instant and GPT-5.1 Thinking to provide different types of communication styles dependent on the user and the query. GPT-5.1 Instant's communication style is "warmer by default and more conversational.