GPT-5.4 with native computer use, NotebookLM Cinematic Videos, Codex on Windows
Week of March 3–5, 2026: OpenAI's GPT-5.4 launches native computer use and reaches 75% on OSWorld, NotebookLM generates immersive videos with Gemini as director, Codex arrives on Windows, and GitHub enables Copilot Memory by default.