GPT-5.1: A smarter, more conversational ChatGPT

We’re upgrading the GPT-5 series with warmer, more capable models and new ways to customize ChatGPT’s tone and style. GPT-5.1 starts rolling out today to paid users.

Source: OpenAI ChatGPT — Published November 12, 2025 at 00:00 UTC — Category: Chatbots