Happy Sunday. This week a 25-year-old's AI hedge fund went up 439% and then imploded, Anthropic shipped a cheaper Claude that rivals its flagship, and Google gave robots a real brain. Here's what actually mattered, broken down so it's worth your five minutes. Let's get into it.
This week in tech + AI
A 25-year-old's AI hedge fund went from up 439% to a fire sale in a matter of weeks. Leopold Aschenbrenner, the ex-OpenAI researcher behind the famous "Situational Awareness" essay, had grown his fund to around $45 billion betting on the AI boom. The problem was leverage. He was reportedly running the book at around 4x, borrowing heavily to amplify his bets, which works beautifully on the way up and brutally on the way down. When his AI infrastructure holdings like SK Hynix and CoreWeave fell 35 to 47%, and his short bets against software names moved against him, his prime brokers (Goldman Sachs, JPMorgan and Bank of America) hit him with margin calls. At 4x leverage even a 25% drop is enough to wipe out your own money, so he couldn't cover them. He was forced to dump his entire public stock portfolio to Ken Griffin's Citadel in one discounted block trade, and the fund collapsed to around $10 billion almost overnight. He did hold onto his best asset though, a roughly $5 billion stake in Anthropic. What it means: leverage is the fastest way to look like a genius and then blow up. The AI trade is real, but it's a reminder that how you bet matters just as much as what you bet on, even for the sharpest people in the room. Read more
Anthropic dropped Claude Opus 5, and it nearly matches their flagship at half the price. It's a real jump in coding and long, multi-step agent tasks, and it's now the default on Claude Max. What it means: if you build or code with Claude, your daily driver just got sharper and cheaper. And this is Anthropic's fourth Claude 5 model in under two months, the frontier moves in weeks now, not years. Read more
Google DeepMind unveiled Gemini Robotics 2, built for humanoid robots. It brings "whole-body" intelligence so machines can handle complex physical tasks, not just careful tabletop moves. What it means: AI is stepping out of the chatbox and into the physical world. Robotics plus AI is shaping up to be one of the biggest arenas of the next decade, worth watching if you want to be early. Read more
The most-read post on Hacker News this week argued AI makes you 2x faster at coding, not 10x. The developer's point: the real gains now come from learning to actually use the tools well, not from waiting for smarter models, and a working first draft is still only about 20% of the job. What it means: the hype says AI replaces engineers, reality says it's a strong multiplier for people who already know what they're doing. Understanding the fundamentals matters more than ever. Read more
On my mind
San Francisco just reminded me again how important your environment actually is. After spending a week in San Francisco with some of my founder and content creator friends, I feel very motivated to keep pushing on my goals and to take on new ambitious projects (such as learning about physical AI). And that definitely wouldn't have happened if I'd stayed home. Leaving your home city, talking to new people and visiting places where you know you'll meet like-minded people (events, hackathons, certain cities) will almost certainly expand your horizons and give you more energy and clarity on your goals. I gained more guidance and energy in this one week than in the months before, just from talking to people and getting their perspectives. So try to surround yourself as much as possible with people who give you new ideas, positive energy and an optimistic mindset. I could definitely imagine living in San Francisco one day for some time, maybe doing an exchange semester there. I really liked it.
More from me
My latest video: I built a neural network completely from scratch, no AI and no libraries, just to see if I actually understand how they work. Watch here
Recommendation of the week: OpenAI's Student Collective is paying undergrads in 8 countries to run AI events on campus (stipend plus free ChatGPT and Codex credits), and applications close August 10. Apply here
Tool of the week (Clicking the Link supports me):
10x the context. Half the time.
Speak your prompts into ChatGPT or Claude and get detailed, paste-ready input that actually gives you useful output. Wispr Flow captures what you'd cut when typing. Free on Mac, Windows, and iPhone.
Have a great week,
Chris