OpenAI has announced ChatGPT 5.1a major update to its GPT-5 model that is already being deployed in its service. The company promises a smarter artificial intelligence (AI), but also more pleasant to use, with clearer responses and behavior more adapted to the daily needs of each person.
The big news is that this leap does not come in the form of a single model, but rather two main variants: GPT-5.1 Instant and GPT-5.1 Thinking. The first focuses on speed and natural conversation, while the second is reserved for complex tasks that require more time for reasoning and more detailed explanations.
A warmer ChatGPT, with a tone to your liking
With ChatGPT 5.1, OpenAI wants to make the tool less robotic and more flexible for the user. GPT-5.1 Instant He is now more conversational by default, follows instructions better, and is able to decide when he needs to “think” a little more before responding. For simple questions, the answer comes quickly; For more delicate requests, it takes a few more seconds to better elaborate the response.
The other big change is in the new ChatGPT personalities. You can now choose from several predefined styles: a more balanced default mode, a profile Friendly closer and talkative, one Efficient for direct answers and options like professional, candid, Quirky, Cynical either Nerdy to adjust the tone to your liking. Even the chatbot itself can suggest changing your style if it detects that you are asking for another type of response.
GPT-5.1 Instant and Thinking: what changes on a daily basis
Although both share a base, GPT-5.1 Instant and GPT-5.1 Thinking They behave differently. Instant will be the model you'll see most of the time: faster, warmer, and with better understanding of instructions. GPT-5.1 Thinking It is reserved for complex queries, such as advanced programming, long analyzes or tasks in which precision matters a lot, and there it dedicates more time to reasoning without abusing technicalities.
OpenAI has also adjusted how each model decides how much it should “think.” If you ask for something simple, even advanced reasoning mode will respond sooner; If you throw a complicated problem at him, he will take more steps and do more elaborate reasoning to explain the solution. On paper, this should reduce that feeling of impersonal or unclear responses that some users noticed with GPT-5, a situation that sparked numerous complaints.
Phased release and availability of GPT-5.1
The update to GPT-5.1 has already started reaching paying users, including plans like Pro, Plus, Go and Business. Over the next few days it will also be extended to those who use ChatGPT for free, both with an account and without logging in. Companies and educational centers have early access through a test switch before the model becomes the default option.
If you still see older GPT-5 models, it's not a bug: OpenAI will keep them as models in legacy mode for about three months. This way, you can compare results between versions and decide which one best fits your workflow before version 5.1 becomes definitive.
Is ChatGPT 5.1 worth trying now?
For the android users who use the ChatGPT app or integrations with this model, GPT-5.1 aims to improve both productivity and more casual conversations. From writing emails and documents to preparing trips or solving study questions, the promise is that the answers are more natural, direct and adapted to the tone you prefer without the need to reformulate the instruction several times.
We are not facing a completely new generation, but we are facing an update that attempts to correct the sometimes distant tone of GPT-5 and offer more control to the user. If you already pay for ChatGPT, you might want to try out the different personalities and switch between Instant and Thinking to see how they fit with your daily use. While OpenAI continues to formalize alliances, with companies like Samsung and amazon, The developers continue working to create an increasingly efficient and pleasant environment for the user. And you, are you going to give ChatGPT 5.1 a try on your mobile or do you still prefer other AI models?
