Summary
Riley Brown rounds up the week’s biggest AI agent news, starting with OpenAI’s two major updates. ChatGPT users can now text their Dot, the personal agent inside ChatGPT, through iMessage, including setting up routines on different channels and controlling a Codex session by voice message from a phone.
OpenAI also revised its subscription plans, doubling usage limits across the Pro 100, 200, and 500 tiers and business premium, and restoring the 20x Plus tier after an earlier reduction drew criticism. The video explains how the new limits compare with what was offered before September 29th.
The roundup continues with a beta of Siri’s new built-in AI model, including a demonstration of onscreen awareness and personal context, followed by Google’s announcement of Gemini 4 Carbon, its biggest Frontier model yet. Brown compares its model card against Claude Opus and GPT-6 Astra, notes the underwhelming reception of the earlier Gemini 4 Argon, and discusses the market reaction around Google’s earnings. He also covers new Grockbot features and Anthropic’s wider rollout of its Duet platform alongside IPO information, making this a useful weekly catch-up for anyone following AI agents.
📺 Source: Riley Brown · Published October 31, 2026
🏷️ Format: Roundup
