Great discussion with @thsottiaux and @steipete on the VivaTech main stage, led by @CharliePerreau
. We’ve moved from conversations with AI to systems that can take action and pursue goals. The momentum behind Codex and agents is impossible to miss!
@romainhuet
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Discussion on AI agents and Codex momentum at VivaTech
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Codex Mobile guide: phone as control center for work
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If you’re getting started with Codex Mobile, @Dimillian
’s guide is worth a read! Your phone isn’t a tiny terminal. It’s a control center for directing and reviewing work running on your laptop or in the cloud. Thomas helped build the experience, and it shows. -
Documentation as product experience: OpenAI docs assistant creates custom guides
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Documentation is a product experience, not just a place to find answers.
— Romain Huet (@romainhuet) 13 juin 2026
Tell the new OpenAI docs assistant what you’re building. It can even create a custom guide for your project that you can then hand off to Codex!
Congrats @kagigz on shipping this! 👏 https://t.co/0az4Coc5XPDocumentation is a product experience, not just a place to find answers. Tell the new OpenAI docs assistant what you’re building. It can even create a custom guide for your project that you can then hand off to Codex! Congrats @kagigz on shipping this!
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Coding Agents Enable New Development Workflows
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This is what becomes possible when you have a coding agent in your pocket. Codex figured out the protocol. ChatGPT opened the door.
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Codex Community Demos: Games, Voice, Hardware Experiments
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Thanks again to @Andy_AJT for making it happen so quickly, and to everyone who joined!
— Romain Huet (@romainhuet) 26 mai 2026
We showed what’s new in Codex live, then gave folks time to build. So fun to see community demos: games, voice interactions, even hardware experiments with Codex pets!https://t.co/Te7IEMxPfDThanks again to @Andy_AJT for making it happen so quickly, and to everyone who joined! We showed what’s new in Codex live, then gave folks time to build. So fun to see community demos: games, voice interactions, even hardware experiments with Codex pets!
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Codex’s AI capabilities on macOS showcased
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Watching Codex use a Mac that’s fully locked feels slightly impossible the first time you see it. Apple built trusted foundations on macOS for this years ago. Codex is now shipping something magical on top of them!
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Generating iOS screens with Codex before implementation
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I like to start by asking Codex to generate a few iOS screens first (using the Image Gen skill), then asking Codex + GPT-5.5 to implement them. Not necessary since iOS already has great default HIG, but it usually ends up closer to what I want when the design direction is clear!
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Building iPhone Apps with Codex in 2026
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I really love building iPhone apps in Codex. Codex can design the screens, write the Swift code with GPT-5.5, run the app in Simulator without opening Xcode, and even click around with computer use to test it!
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Swift iPhone Development with AI Tools
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Same! Building iPhone apps in Swift is still one of my favorite things to do in Codex. These days I do it all there: GPT-Image-2 for the design, GPT-5.5 for the code, then ask Codex to run it in Simulator without opening Xcode. Hard to beat!
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Codex Launches Chrome Extension for macOS and Windows
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Codex now has a Chrome extension for macOS and Windows!
— Romain Huet (@romainhuet) 8 mai 2026
The cool part is that it can work with logged-in websites in the background while you keep using your browser, and combine Chrome with other tools like plugins to complete the task. https://t.co/9ZzvwldB52Codex now has a Chrome extension for macOS and Windows! The cool part is that it can work with logged-in websites in the background while you keep using your browser, and combine Chrome with other tools like plugins to complete the task.