ChatGPT and Codex Merge: A Billion Users Gain a Super Agent

OpenAI announced that Codex will be integrated into ChatGPT within weeks, unveiling three major upgrades—Agent plugins, Annotations, and Sites—while reporting a six‑fold surge in weekly active users, a new suite of role‑specific AI colleagues, and a token‑efficient GPT‑5.5 engine that reshapes AI productivity for over a billion users.

AI agentsAI productivityAgent plugins

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ChatGPT and Codex Merge: A Billion Users Gain a Super Agent

Frontend AI Walk

Dec 30, 2025 · Artificial Intelligence

What Are Claude Skills? The Brain Plug that Turns AI into a Digital Expert

Claude Skills are lightweight, open‑format collections of instructions, scripts, and resources that act as modular knowledge packages, enabling the AI to lazily load expertise on demand, improve token efficiency by up to 90 %, support version control, and turn the model into a reusable, domain‑specific expert.

AI SkillsAgent pluginsClaude

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What Are Claude Skills? The Brain Plug that Turns AI into a Digital Expert