In Short:
– OpenAI launched GPT-5.1 with two models to improve ChatGPT’s conversation and user control.
– The update, initially for paid users, addresses prior complaints and introduces adaptive reasoning and personality presets.

OpenAI launched GPT-5.1 today, featuring two upgraded models aimed at enhancing ChatGPT’s conversational abilities and providing users better control over its personality.The update started rolling out to paid subscribers on November 12, introducing GPT-5.1 Instant and GPT-5.1 Thinking, both designed to address complaints regarding the original GPT-5 release in August.

GPT-5.1 Instant is said to be “warmer by default and more conversational,” with early testers noting its playfulness while remaining clear and useful.

The launch follows a backlash from users after GPT-5’s release, who criticized its “colder” tone and the removal of previous models like GPT-4o. OpenAI’s CEO, Sam Altman, admitted that discontinuing GPT-4o “was a mistake” and acknowledged the emotional attachment users had to specific models.

Adaptive Reasoning

GPT-5.1 Instant introduces adaptive reasoning, which helps it determine when to “think before responding” to complex questions.

This leads to marked improvements in mathematical and coding tasks. GPT-5.1 Thinking adjusts processing time based on the task, resulting in clearer explanations and improved ease of use for various tasks.

The new version includes six personality presets, allowing users to tailor interactions. OpenAI aims for the model to integrate cognitive and emotional intelligence effectively.

For now, the rollout is for paid users, with free access occurring soon. Both models will be available via API, and legacy models will remain accessible for three months.