AI This Week: Gemini 4 Argon vs Muse Wonder, Meta's 816B Open Model & a $1T AI Sell-Off | Week 42

AI news for 13–20 October 2026, explained for a UK audience: Gemini 4 Argon edges Muse Wonder on the Arena leaderboard at less than half the cost per task, Meta gives away an 816-billion-parameter open-weights model, and AI and chip stocks lose around $1 trillion (about £750 billion) in a single week. Full reviews, pricing and comparisons: https://aitoolsreview.co.uk In this week's episode: • Gemini 4 Argon vs Muse Wonder – Arena scores 1,525 vs 1,513; cost per task roughly £1.50 vs £3.40 • Meta's 816B open-weights model – and the two Mac Studios it can run on • NVIDIA Nemotron 3.5 Super VL and Bolt – open models for always-on agents • Inception Mercury 3 – a diffusion language model writing 1,000+ tokens a second • One hacker, AI agents and a few thousand dollars – 100+ company websites breached (Reuters) • OpenAI discloses 4 misalignment incidents, 2 of them critical • US government orders DeepSeek off civilian systems • OpenAI chases a $1.4 trillion+ valuation as Anthropic's IPO approaches • Juniors fall from 27% to 9% of Anthropic's technical hires • Regulators: first EU AI Act information requests to OpenAI and Anthropic, FTC subpoenas, US states suing OpenAI over child safety, news publishers taking Anthropic to court • Try this week: ChatGPT can now act across your Chrome tabs, and GPT-4o retires from the API in January Chapters 0:00 Intro – this week in AI 0:21 The models: Gemini 4 Argon, Muse Wonder, Meta, NVIDIA 1:23 The speed race: Inception Mercury 3 1:49 Security: AI-agent hacking, OpenAI incidents, DeepSeek ban 2:28 Follow the money: $1T sell-off, OpenAI valuation, Anthropic hiring 3:05 The regulators: EU AI Act, FTC, US states 3:27 Try this week: ChatGPT in Chrome, GPT-4o retirement Read more on aitoolsreview.co.uk Gemini news and models: https://aitoolsreview.co.uk/insights/gemini OpenAI and ChatGPT: https://aitoolsreview.co.uk/insights/openai Claude and Anthropic: https://aitoolsreview.co.uk/insights/claude DeepSeek: https://aitoolsreview.co.uk/insights/deepseek Inception Mercury: https://aitoolsreview.co.uk/tool/inception/mercury AI model benchmarks: https://aitoolsreview.co.uk/benchmarks Latest AI tools: https://aitoolsreview.co.uk/latest-ai-tools More videos: https://aitoolsreview.co.uk/videos Subscribe for a weekly AI round-up every week, with prices in pounds as well as dollars. The presenter in this video is an AI-generated avatar. Sources are shown on screen. #AINews #Gemini #ChatGPT