OpenAI has launched GPT-5.1, an upgrade to the GPT-5 series that makes ChatGPT both smarter and more enjoyable to talk to. The rollout starts with paid users and is expanding to everyone over the next few days. Learn more on the official announcement.
What’s new in GPT-5.1?
- GPT-5.1 Instant – the most-used ChatGPT model, now warmer, more conversational, and better at following your instructions, with improved performance on math and coding tasks.
- GPT-5.1 Thinking – an advanced reasoning model that adapts its thinking time: faster on simple questions, more thorough on complex ones, and easier to understand in everyday use.
Why it matters
GPT-5.1 focuses on two things users care about most: intelligence and communication style. Conversations feel more natural and human-like, while the model still delivers strong reasoning for planning, coding, analysis, and learning.
Available now
- Rolling out in ChatGPT, starting with paid users, then broader access.
- Coming to the OpenAI API as part of the GPT-5 family, including GPT-5.1 Instant and GPT-5.1 Thinking with adaptive reasoning.
If you rely on AI for work, study, or creative projects, GPT-5.1 is a meaningful step toward a more personal, helpful, and flexible ChatGPT experience. Try it now via ChatGPT or read the full details on OpenAI’s blog: GPT-5.1: A smarter, more conversational ChatGPT.