Descriptions:
Riley Brown delivers a focused 30-minute walkthrough of OpenAI’s Codex — positioned as the agent-native evolution beyond ChatGPT — covering its seven core capabilities with live demonstrations of each. The video distinguishes Codex from standard ChatGPT by emphasizing local file storage, full computer control, and a plugin ecosystem that includes Gmail, Notion, and Excalidraw integrations.
Demonstrations include: having the agent analyze 53 receipt photos from a local downloads folder and generate a multi-tab Excel dashboard (total spend: $25,982, with category and payment method breakdowns); scanning recent emails to surface brand deal opportunities and compile them into a markdown table; drafting a long-form video script by reading previous scripts from Notion to match writing style; and using the Paper MCP to generate UI designs in real time inside a Figma-like canvas. The video also explains Codex’s skills system — reusable instruction files that function as SOPs for the agent — and how to chain plugins across parallel chat threads for multitasking.
For anyone evaluating Codex against Claude Code or other agent tools, this video provides the most structured overview available, with concrete output examples and workflow patterns across knowledge work and coding tasks alike. GPT 5.5 (high and extra-high) is used as the underlying model throughout.
📺 Source: Riley Brown · Published April 29, 2026
🏷️ Format: Tutorial Demo
