OpenAI

GPT-5.3-Codex-Spark is now in research preview. You can just build things—faster.

We’re starting to roll out a test for ads in ChatGPT today to a subset of free and Go users in the U.S. Ads do not influence ChatGPT’s answers. Ads are labeled as sponsored and visually separate from the response. Our goal is to give everyone access to ChatGPT for free with fewer limits, while protecting the trust they place in it for important and personal tasks. http://openai.com/index/testing-ads-in-c…

We worked with @Ginkgo to connect GPT-5 to an autonomous lab, so it could propose experiments, run them at scale, learn from the results, and decide what to try next. That closed loop brought protein production cost down by 40%.

There have been over 500K Codex app downloads since Monday. You can just build things, a thread 🧵

Meet the Frontier Builders.

GPT-5.2-Codex is now available in Codex. It sets a new standard for agentic coding in real-world software development and defensive cybersecurity. It also delivers more reliable performance on complex tasks and scales effectively across large projects.

We’ve developed a new way to train small AI models with internal mechanisms that are easier for humans to understand. Language models like the ones behind ChatGPT have complex, sometimes surprising structures, and we don’t yet fully understand how they work. This approach helps us begin to close that gap.

Deep research in ChatGPT is now powered by GPT-5.2. Rolling out starting today with more improvements.

You can just build things.

GPT-5.3-Codex is now available in Codex. You can just build things. openai.com Introducing GPT-5.3-Codex From openai.com

Much of today’s scientific tooling has remained unchanged for decades. Prism changes that. @ALupsasca joins @kevinweil and @vicapow to walk through what it looks like when GPT-5.2 works inside a LaTeX project with full paper context.

In the coming weeks, we plan to start testing ads in ChatGPT free and Go tiers. We’re sharing our principles early on how we’ll approach ads–guided by putting user trust and transparency first as we work to make AI accessible to everyone. What matters most: - Responses in ChatGPT will not be influenced by ads. - Ads are always separate and clearly labeled. - Your conversations are private from advertisers. - Plus, Pro, Business, and Enterprise tiers will not have ads.

Group chats in ChatGPT are now rolling out globally. After a successful pilot with early testers, group chats will now be available to all logged-in users on ChatGPT Free, Go, Plus and Pro plans.

Reddit AMA on GPT-5.1 and our customization updates. Tomorrow, 2PM PT.

This week's podcast is all about ads. Asad Awan, one of the leads behind ads at OpenAI, joins @AndrewMayne to share how we came up with our ad principles and how ads in ChatGPT free and Go tiers expand AI access for all.

Over 300M people use ChatGPT to learn how to do something every week. More than half of US ChatGPT users say it enables them to achieve things that previously felt impossible. These are just a few stories of what they are building.

Introducing OpenAI Frontier—a new platform that helps enterprises build, deploy, and manage AI coworkers that can do real work.

Introducing the Codex app—a powerful command center for building with agents. Now available on macOS.

Every day, millions of people ask ChatGPT about their health – from breaking down medical information, preparing questions for their doctor's appointments, to helping people manage their overall wellbeing.

Group chats in ChatGPT are now piloting in Japan, New Zealand, South Korea, and Taiwan. A new way to collaborate with friends, family, or coworkers and ChatGPT in the same conversation.