OpenAI releases ‘warmer, more intelligent’ GPT-5.1 for ChatGPT

Back in August, OpenAI unveiled GPT-5, a major frontier model update to ChatGPT. Three months later, OpenAI is back with GPT-5.1, which it says is “now warmer, more intelligent, and better at following your instructions.”

Instant and Thinking improvements

According to OpenAI, GPT-5.1 focuses on both communication style and intelligence. The company summarizes improvements to both the instant model and thinking model:

GPT‑5.1 Instant: our most-used model, now warmer,…