OpenAI's Codex 3.0, powered by GPT-5.5, evolves into a fully autonomous coding agent capable of building, testing, and debugging applications end-to-end. It uses vision and browser interaction to test workflows like a real user, navigates browsers, interacts with web apps, generates documents in Microsoft Office and Google Drive, and debugs via console and network logs in real-time. The goal is to automate the full build-test-debug loop, reducing manual QA and accelerating development cycles.
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