Aakash Gupta@aakashgupta
OpenAI quietly solved the single problem that's been blocking computer-use agents from going mainstream: the cursor war.
Anthropic shipped computer use in October 2024. OpenAI shipped Operator. Google shipped Mariner. All three hit the same wall. When the agent moves the cursor, you can't. The screen is one resource, and two drivers cannot share it. Every demo ended the same way: "run this while I go get coffee."
That kills the ROI math. If the human has to stop working to let the agent work, the agent is functionally a replacement. Adoption of computer-use agents flatlined at power users and scripted demos for exactly this reason.
Here's what OpenAI actually shipped. Codex runs multiple agents against your real Mac apps, in parallel, with their own cursors, in the background, while you keep using your machine. The mechanism is OS-level sandboxing. OpenAI acquired Sky Applications last fall. That's the team that built Workflow, which became Apple Shortcuts. They spent a decade figuring out how to let third-party code drive other Mac apps without breaking the foreground experience. OpenAI didn't buy a team. They bought the only people on Earth who had solved this.
The economic unit of white-collar work just changed. Yesterday the ceiling was one human with one agent doing one task. Today it's one human supervising five agents working across five apps the human is simultaneously using. The bottleneck stops being compute. It becomes the human's ability to review output.
Codex has 3M weekly devs. The feature that matters is not the IDE. It's that OpenAI turned the Mac into a multiplayer instrument.