
- OpenAI has unveiled its new GPT‑5.1 model and made it the default option for ChatGPT
- ChatGPT includes a faster Instant and more in-depth Thinking variations of GPT-5.1, and applies adaptive reasoning to decide when to use each
- ChatGPT has also added personality controls allowing users to adjust the manner and style of the AI's response, even mid-conversation
OpenAI has introduced the much-anticipated GPT-5.1 AI model, incorporating both the 'Instant' and 'Thinking' variations into ChatGPT as the new default for paying subscribers.