ChatGPT 5.1 Codex Just dropped and it’s a MAJOR Upgrade (full guide)

ChatGPT 5.1 Codex just dropped and it's amazing. Here are all the strengths, weakness, and a master workflow.

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Prompt:
I want to build a full suite productivity app. I want it to have a kanban board, todo list, and calendar. I want to use NextJS and Tailwind v3. I want it to look clean with a minimal design that doesn't look like an AI made it. Use local storage for now. Please make a plan for this

Timestamps:
0:00 Intro
0:43 The announcement
1:14 The 3 new models
3:28 Codex workflow
14:27 Codex vs Claude Code

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