AI Briefing: The Mythos Era Begins and the 12-Month Startup Window

Stories covered on 2026-04-20

1. I Downloaded a 2.6 GB File and Got an AI That Answers Everything ChatGPT Refuses to Touch

   Towards AI · 2026-04-20

   Cerberus 4B is a 2.6 GB uncensored local AI model with no censorship, no cloud, no fees — run it forever on your own hardware.

2. Anthropic takes $5B from Amazon and pledges $100B in cloud spending in return

   TechCrunch · 2026-04-20

   Amazon has made another circular AI deal: It's investing another $5 billion in Anthropic. Anthropic has agreed to spend $100 billion on AWS in return.

3. DOJ Signals Antitrust Shift on Media Deals as AI Alters Industry

   Bloomberg · 2026-04-20

   Rapid changes in media fueled by increased use of artificial intelligence and streaming services require a “cautious humility” from antitrust enforcers as they assess whether

4. Google rolls out Gemini in Chrome in 7 new countries

   TechCrunch · 2026-04-20

   Google is rolling out Gemini in Chrome in Australia, Indonesia, Japan, the Philippines, Singapore, South Korea, and Vietnam.

5. Google brings Gemini in Chrome to users in Australia, Japan, Singapore and South Korea

   Engadget · 2026-04-20

   After debuting in the US, Gemini in Chrome is making its way to more markets. Starting today, Google is rolling out Chrome's built-in chatbot to users in countries in East Asia and

6. Google Bets on New Chips to Boost AI Results, Challenging Nvidia

   Bloomberg · 2026-04-20

   In a matter of months, Google’s AI chips have become one of the hottest commodities in the tech sector.

7. Google to Release New AI Chips, Challenging Nvidia | Bloomberg Tech 4/20/2026

   Bloomberg · 2026-04-20

   Bloomberg’s Caroline Hyde and Ed Ludlow discuss Google’s plans for new AI chips focused on inference.

8. Amazon to Invest an Additional $5 Billion in Anthropic

   Bloomberg · 2026-04-20

   Amazon.com Inc. is investing an additional $5 billion in Anthropic PBC and may inject $20 billion more over time

9. PGIM's Marcus: Seeing More Office-to-Housing Conversion

   Bloomberg · 2026-04-20

   PGIM Co-Head and Global COO of Real Estate Cathy Marcus discusses how the AI data center boom is testing buildout limits, the 'serious' issue with housing supply in the US

10. The RAG Problem

    Towards AI · 2026-04-20

    Why RAG looks Easy, but is really much HarderContinue reading on Towards AI »

11. Your Questions About Anthropic’s Mythos AI Model, Answered

    Bloomberg · 2026-04-20

    Bloomberg reporters answered dozens of questions from readers about the new model in a Live Q&A conversation

12. It’s not just one thing — it’s another thing

    TechCrunch · 2026-04-20

    This sentence construction ("It's not just this — it's that") has become so common in AI-generated writing that it's no longer just a clue that a piece of writing may be synthetic

13. Robot runner handily beats humans in half-marathon, setting new record

    Ars Technica · 2026-04-20

    A humanoid robot's record half-marathon run shows China's speed in robotics.

14. OpenAI's Codex now watches your screen to remember what you're working on

    The Decoder · 2026-04-20

    OpenAI is giving Codex a memory of what's on screen. The new Chronicle feature tracks what users are working on and remembers it for future tasks

15. LinkedIn's new Crosscheck feature lets premium subscribers test competing AI models for free

    Engadget · 2026-04-20

    You can now use LinkedIn to test out some of the latest AI models from OpenAI, Anthropic, Google, Microsoft and other companies without having to worry about token limits or paying

16. IPO Market Revs Back Up Ahead of Mega Listings

    Bloomberg · 2026-04-20

    Greg Martin, managing director of private markets at Rainmaker Securities, discusses the signs of life the IPO market is showing and what impact the expectations of large listings

17. Physics-Inspired Generative Modeling: Diffusion, Flow Matching, and Energy-Based Models

    Towards AI · 2026-04-20

    A new approach leverages physics principles to enhance generative AI models, specifically diffusion, flow matching, and energy-based architectures.

18. Claude Code’s 512,000-Line Leak Reveals Why AI Wrappers Are the Real Product

    Towards AI · 2026-04-20

    The Claude Code source code leak gave the AI community something rare: a look inside a production-grade agentic system built by the people…

19. Google to Release New Inference-Focused Chips

    Bloomberg · 2026-04-20

    Google plans to announce its new generation of custom-designed chips, known as tensor processing units, or TPUs, this week.

20. Musk Snubs French in Case Over Grok Sexual Images, AFP Says

    Bloomberg · 2026-04-20

    Elon Musk snubbed a summons by French prosecutors investigating how AI chatbot Grok was allowed to spew out sexually explicit deepfakes and Holocaust-denying content

21. Deezer says 44% of new music uploads are AI-generated, most streams are fraudulent

    Ars Technica · 2026-04-20

    AI tracks account for a small fraction of Deezer streams, and most are demonetized for fraud.

22. Open-weight Kimi K2.6 takes on GPT-5.4 and Claude Opus 4.6 with agent swarms

    The Decoder · 2026-04-20

    Moonshot AI has released Kimi K2.6 as an open-weight model. It's built to match GPT-5.4 and Claude Opus 4.6 on coding benchmarks, and it can run up to 300 agents in parallel.

23. Fortnite developers can make AI characters now — just don’t try to date them

    The Verge · 2026-04-20

    Following last year's AI-powered Darth Vader in Fortnite that swore in a re-creation of James Earl Jones' voice

24. Is Richard Tice’s picture AI-manipulated? Here are five giveaways

    The Guardian AI · 2026-04-20

    Experts and social media sleuths studying the Reform deputy leader’s image of an apparent campaign event say the sausage fingers point to sleight of hand *** After Richard Tice

25. Google builds elite team to close the coding gap with Anthropic

    The Decoder · 2026-04-20

    Google is doubling down on AI coding and betting on models that can eventually improve themselves. Sergey Brin is once again leading the charge to keep Google's AI competitive.

26. UK Executives See More AI Job Cuts

    Bloomberg · 2026-04-20

    Half of UK executives now think AI will mean fewer jobs over the next decade — with young workers expected to be hardest hit. Irina Anghel explains. (

27. Deezer says AI-made songs make up 44 percent of daily uploads

    Engadget · 2026-04-20

    AI-generated music is spreading like wildfire, according to Deezer, who reported receiving nearly 75,000 uploads of AI-made tracks a day on its platform.

28. NSA spies are reportedly using Anthropic’s Mythos, despite Pentagon feud

    TechCrunch · 2026-04-20

    NSA is said to be using Anthropic's restricted Mythos AI model.

29. 60,000 Developers Are Using a Markdown File to Fix How AI Writes Code

    Towards AI · 2026-04-20

    Zero lines of code. Four principles. One file that changes everythingContinue reading on Towards AI »

30. CEO and CFO suddenly depart AI nuclear power upstart Fermi

    TechCrunch · 2026-04-20

    The startup, co-founded by former U.S. Energy Secretary Rick Perry, has faced headwinds with its AI campus in Texas.