Codex 3.0 by OpenAI
Codex can now build, test & debug on autopilot
Our Take
OpenAI dropped Codex 3.0, and it's actually different from the other AI coding tools I've seen — this one isn't just autofilling your code, it's literally sitting at your computer, clicking through browsers, running tests, catching bugs in real-time, and fixing them before you even know something broke. That's the entire dev loop on autopilot, not just the pretty generation part, and with a 5.0 rating and GENYSAI already using it in production, this is low-key the move if you're tired of the build-test-debug grind.
With GPT-5.5, Codex evolves into a true cross-app coding agent—navigating browsers, interacting with web apps, generating docs in Microsoft Office and Google Drive, and testing workflows like a real user. It sees, clicks, debugs, and iterates autonomously, bringing developers closer to reliable, end-to-end automated builds.
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