📰 AI News: GPT-5.3 Codex Turns Coding Agents Into Full Computer Coworkers
📝 TL;DR OpenAI just launched GPT-5.3 Codex, its most powerful coding and computer use model so far, tuned to handle long running projects, not just snippets. It is faster, smarter, and built to act like a teammate that can actually drive your apps, files, and tools with you watching. It sets new records on tough coding and computer use benchmarks and is designed to handle multi day tasks like building full apps, debugging real repos, and producing finished work products like slide decks and spreadsheets. You can use it inside the Codex app, CLI, IDE extensions, or the web experience, with API access coming later. 📜 The Announcement OpenAI announced GPT-5.3 Codex as the new flagship for Codex, describing it as the most capable agentic coding model it has released so far. It advances frontier coding performance while matching GPT-5.2 on professional knowledge work, which means it is just as comfortable writing production code as it is creating presentations or analyses around that code. A fun twist, early versions of GPT-5.3 Codex were used to help build, debug, and deploy the final model itself. The team leaned on Codex to monitor the training run, tune infrastructure, investigate weird user edge cases, and even generate reports on how much extra work the new model was getting done per turn. ⚙️ How It Works • Frontier coding engine - GPT-5.3 Codex sets new highs on industry style coding benchmarks and uses fewer tokens to solve tasks, so it can tackle more work inside the same context budget. • Real web and UI building - It can build full games and complex web apps from scratch, then iterate over millions of tokens with prompts like fix the bug or improve the game while keeping style and structure coherent. • Beyond code into knowledge work - The model can take a detailed brief and produce finished assets such as slide decks, training docs, spreadsheets, and reports that match real world professional tasks.