Summary
OpenAI’s Dev Day brought a long list of updates to ChatGPT and Codex, and this video from Riley Brown walks through 20 of them with hands-on demonstrations. The biggest addition is Dot, a named personal AI agent that runs on its own virtual computer and connects to the tools users already rely on. Dot can be reached by voice call, Slack message, or text, and it can manage email and calendar, draft documents, and message colleagues while working in the background for hours.
The walkthrough shows Dot in practice: checking an email about a 3D printer order, generating printable project ideas, publishing them as a shareable page, and forwarding the result to a coworker over Slack, all through a phone call in the ChatGPT iOS app. It also covers the new model that is positioned as nearly matching OpenAI’s top model at roughly one-fifth of the cost, plus the faster generation modes, including an ultra-fast option that trades much higher usage for around eight times the speed on the $500 per month plan.
The video also explores the new Space area, where people and agents can create pages, presentations, and sites. Pages works like a Notion-style editor with Mermaid diagrams, callouts, tables, checklists, and interactive charts. Viewers get a practical overview of what changed in the ChatGPT desktop, iOS, and web apps and which updates are worth trying first.
📺 Source: Riley Brown · Published October 03, 2026
🏷️ Format: Roundup
