**OpenAI Unveils GPT-5.1: Advancements in Communication and Intelligence**
In August, OpenAI launched GPT-5, signaling a major upgrade to its ChatGPT model. Now, only three months later, the organization has released GPT-5.1, which claims to be “more personable, smarter, and superior in following your directives.”
### Instant and Thoughtful Enhancements
OpenAI highlights that GPT-5.1 improves both the communication approach and the intelligence of the model. The enhancements are divided into two primary models:
– **GPT-5.1 Instant**: This is the most frequently used model, crafted to be more conversational and responsive to user guidelines. The outputs produced by this model are meant to sound less like scripted information and more like authentic writing, with a warmer tone now set as the standard.
– **GPT-5.1 Thinking**: This sophisticated reasoning model has been optimized for speed, enabling quicker responses to straightforward tasks while being more comprehensive on complex issues. It also adopts the warmer tone by default.
OpenAI has implemented new features that permit users to choose the tone of responses, providing options like friendly, efficient, professional, candid, and quirky. This functionality seeks to improve user engagement by personalizing outputs to individual tastes.
A significant enhancement in the Instant model is its improved adherence to user instructions. For example, the model can now respond to prompts with a defined word count, addressing a typical annoyance users faced with earlier versions.
### Accessibility
GPT-5.1 is being made available to paying customers on Pro, Plus, Go, and Business plans, with the rollout expected to extend over the coming days. Users without a subscription and those not logged in will receive access to the new model following the initial rollout phase. OpenAI has assured that GPT-5 will continue to be accessible for at least three months for paying users, responding to feedback regarding the sudden discontinuation of previous models after GPT-5 was introduced.
Furthermore, Apple has announced that ChatGPT will incorporate GPT-5 via Siri with Apple Intelligence beginning with iOS 26, with a transition to GPT-5.1 expected in an upcoming software update.
For additional information, you can view the complete GPT-5.1 announcement from OpenAI [here](https://openai.com/index/gpt-5-1/).
