Credit: Calvin Wankhede / Android AuthorityTL;DROpenAI has released ChatGPT 5.1, featuring enhanced intelligence and more distinct personalities.The AI model now understands your questions better, offers faster responses, adapts to your tone, and even allows you to choose how it should sound.The two main models OpenAI has released include: GPT-5.1 Instant and GPT-5.1 Thinking.OpenAI has announced and started rolling out ChatGPT 5.1. According to the company, its latest AI model is not just smarter, it’s also got a bit more personality than before. The update also brings improvements to how ChatGPT understands your questions, adapts to your tone, and even allows you to choose how it should sound when interacting with you.