I sit down with Riley Brown to get a hands-on tour of OpenAI’s Codex, which he argues is the most powerful single interface for using AI agents today. Riley walks me through how Codex unifies vibe coding, knowledge work, browser use, computer use, and automations into one app, all running on GPT 5.5. I come in as a complete Codex skeptic who has spent most of my time in Claude Code, and Riley shows me skills, plugins, projects, Remotion, Chronicle, and the in-app browser to make his case. By the end, the question becomes whether the era of separate tools for documents, decks, code, and research is collapsing into a single super app.
00:00 – Intro
03:23 – What is Codex
06:46 – Why a GUI beats the terminal for most users
10:13 – Codex: the all in one platform
12:48 – Atlas browser inside Codex
14:21 – Remotion explained and motion graphics workflows
19:28 – Computer use and Chronicle
22:26 – Plugins, skills, MCPs, and integrations
31:57 – Evals, examples, and good outpu
38:43 – Hard questions: who Codex is built for
40:44 – Browser use plays itself in chess
43:20 – Running Claude Code inside Codex
45:58 – GPT 5.5 cost and effort settings
48:50 – GPT Images 2.0
54:09 – Why most people feel overwhelmed by AI tools
57:09 – Three projects to start with on day one and Closing thoughts
Key Points
* Codex is positioned as a super app where coding, documents, decks, research, and automations live in one interface, with GPT 5.5 as the underlying model.
* The trend across Codex, Cursor, and the Claude Code desktop app is the same GUI pattern: chats on the left, agent in the middle, output on the right.
* Plugins offer official integrations like Slack, Notion, Sheets, Remotion, and Canva, while skills are user-created instructions stored as a SKILL.md file.
* Computer use and browser use have crossed a speed threshold; the chess demo runs at near-human pace, a leap from earlier "dial-up" feeling agents.
* Running Claude Code inside the Codex terminal lets you stack both subscriptions and use each model where it shines.
* The biggest unlock for companies is collecting good examples of finished work so agents can match the bar.
Numbered Section Summaries
1. The Codex Premise I open with Riley’s claim that Codex is the strongest interface for AI agents available today, powered by GPT 5.5, and bundled into any ChatGPT subscription. He frames the episode as a tour of how to do all of your knowledge work and coding inside one platform.
2. One Platform for Code and Knowledge Work Riley shows that Codex creates apps, spreadsheets, charts, Word docs, and PowerPoint decks in the same interface, with exports to tools like Canva. He contrasts this with Claude’s split between Cowork and Claude Code, which he finds limiting because each surface has separate permissions.
3. Browser Use, Computer Use, and Chronicle We walk through OpenAI’s Atlas browser folding into Codex, the speed jump in computer use (controlling Canva, exporting files, feeding results back), and Chronicle, a screen-watching memory layer released two days before recording. Riley flags privacy as a real consideration while still recommending people learn what it does.
4. Plugins, Skills, and Automations Riley untangles the overlapping vocabulary of plugins, skills, MCPs, and connectors. Plugins are OpenAI-approved integrations like Slack, Notion, Sheets, Expo, Remotion, and Canva. Skills are user-built folders with a SKILL.md file, easy to generate by asking Codex to make one. Automations turn any one-shot workflow into a recurring scheduled task.
5. Models, Costs, and Stacking Subscriptions We cover GPT 5.5’s pricing (roughly twice the cost of GPT 5.4 via API, around 20% higher than Opus 4.7), effort settings (low, medium, high, extra high), and the trick of opening the Codex terminal, typing `claude`, and running Claude Code inside Codex on the Anthropic subscription.
6. Day-One Projects and Closing Advice Riley closes with a starter pack: have fun first, build a small game and let browser use play it, run a deep research task into a spreadsheet then a doc and a deck, try a 3D simulation, and pick the most annoying daily task to convert into an automation. The deeper message lands as: tinker, look dumb, and follow the rabbit holes.
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The Vibe Marketer – Resources for people into vibe marketing/marketing with AI: https://www.thevibemarketer.com/
FIND ME ON SOCIAL
X/Twitter: https://twitter.com/gregisenberg
Instagram: https://instagram.com/gregisenberg/
LinkedIn: https://www.linkedin.com/in/gisenberg/
FIND RILEY ON SOCIAL
X/Twitter: https://x.com/rileybrown
Vibe Code App: https://www.vibecodeapp.com/
Youtube: https://www.youtube.com/@rileybrownai/videos
