Alexander Embiricos

Oh right i realize hell freezes over, we reached the point where app > cli That combined with the speed increase also means less windows necessary, codex goes brrrr now! developers.openai.com/codex/app/

GPT-5.4 is here. Native computer-use capabilities. Up to 1M tokens of context in Codex and the API. Best-in-class agentic coding for complex tasks. Scalable tool search across larger ecosystems. More efficient reasoning for long, tool-heavy workflows. openai.com/index/introduc…

The Codex app is now live on Windows. The app runs both natively and in WSL, with integrated terminals for PowerShell, Command Prompt, Git Bash, or WSL. We also built the first Windows-native agent sandbox — using OS-level controls to block filesystem writes outside your working folder and prevent outbound network access unless you explicitly approve it. Plus: 7 new “Open in …” apps and 2 new Windows skills (WinUI + ASP.NET). Try it and tell us what you think.

Code → design → code Generate design files from code, collaborate in @Figma, and implement updates all within Codex without breaking your flow.

Nice shout-out from @embirico from the OpenAI Codex team in 20VC at thetwentyminutevc.com/alexander-embi…. > Q: Which lesser-know competitor do you respect the most, and why? > A: The first one that comes to mind is Amp. Their product has a great reputation as punching way above its weight. ... The other thing I really respect is that they helped initiate the standardization around agents.md. Quinn started this all by putting out a tweet saying "if you buy the domain agents.md, we’ll standardize on it". ... The feeling is mutual. Not only is GPT-5.3 Codex my most-used model right now (primarily in Amp's deep mode), but the Codex macOS app is fantastic, and I have been recommending a lot of people try it alongside other coding agents. (Why would I do that? Well, it is true, you *should* try it. Also, it is so clear to me that what we all are building, this crazy time in the world, transcends any kind of zero-sum product competition. We are all learning from each other and building things today with the knowledge that the current iterations of our products will be obsolete in a few months anyway. I have massive respect for everyone else building in this space. And we set up Amp Inc to not need to optimize for short-term zero-sum growth.)

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I’m joining OpenAI Codex to work on the future of agentic development! At Cursor, I got to see the shift from autocomplete to agents. The next step isn’t a better IDE. It’s an Agent Development Environment (ADE): systems and tools for orchestrating agents, reasoning over their outputs, and making them autonomous enough to reliably complete ambitious work. After chatting with @embirico and @thsottiaux, it was clear that Codex is the best place to realize this vision. The team has consistently shipped SOTA models for agentic coding (check out gpt-5.3-codex) and I’m pumped for the future that the new Codex App points to. What I’m most excited about is the broader mission: accelerating the knowledge work economy. All agents are coding agents, and we’re already seeing Codex used across every job function within organizations. I’m extremely grateful for my time at Cursor, working with the incredible team, and I’m proud of what we built together. I’m excited to take an even bigger swing with Codex. If you’re curious to get a glimpse of where we are headed, download the Codex App! If you want to work on this mission, please apply or reach out - we are hiring across all functions! You can just build things.

ICYMI: you can build on codex and embed it directly in your apps w/ ChatGPT OAuth! P.S. It’s all Open Source, always has been developers.openai.com/codex/app-serv…