Tech

Introducing GPT-4.5

A research preview of our strongest GPT model. Available to Pro users and developers worldwide.

OpenAI to acquire Neptune

Gaining deeper insight into how frontier models learn.

Introducing ChatGPT Atlas

Today we’re introducing ChatGPT Atlas, a new web browser built with ChatGPT at its core.

Introducing OpenAI o1

We've developed a new series of AI models designed to spend more time thinking before they respond. Here is the latest news on o1 research, product and other updates.

How confessions can keep language models honest

We’re sharing an early, proof-of-concept method that trains models to report when they break instructions or take unintended shortcuts.

Introducing OpenAI o3 and o4-mini

Update on June 10, 2025: OpenAI o3‑pro is now available to Pro users in ChatGPT, as well as in our API. Like OpenAI o1‑pro, o3‑pro is a version of our most intelligent model, OpenAI o3, designed to think longer and provide the most reliable responses. Full details can be found in our release notes⁠(opens in a new window).