Robert Caro – The master biographer reflects at 91

The Robert Caro interview. Watch on YouTube; listen on Apple Podcasts or Spotify. Sponsors Antithesis lets you run thorough simulation tests on every PR your coding agents ship. That’s because Antithesis is FAST. On a recent project, it packed fifteen hours of simulation into each fifteen-minute run: every change could be tested in thousands of hostile worlds before being merged. Every minute your software spends in Antithesis is one of the unluckiest hours it will ever experience. Learn more at antithesis.com/dwarkesh WorkOS’s Airlock is a judgment layer that sits between your agents and your most important tools. When an agent makes a request, Airlock evaluates it against your company’s policies and decides whether to allow it, block it, or escalate it to a human. If it allows it, Airlock takes action on behalf of the agent, which means your agents never see your API keys or other credentials. Airlock is in early access. If you’re interested, go to workos.com/airlock Jane Street’s mystery ASIC puzzle is over, and they’ve published a blog post that reveals the chip’s purpose. You can read it here: blog.janestreet.com/asic-puzzle-results/. More importantly, there’s another challenge live now! For this one, you have to design a protocol-emulator ASIC that can be used to test chips outside of a live system. Jane Street will pay to fabricate their favorite submissions. The competition is open until January 18th. Get started at janestreet.com/dwarkesh Timestamps (00:00:00) – How Caro gets people to talk (00:05:03) – Does America need a little more Moses today? (00:12:42) – Moses the young idealist (00:17:57) – Watching Moses lose power (00:24:01) – Did Moses realize he was changing? (00:27:53) – Building during the Great Depression (00:32:51) – The threats and promises of…

What I learned about power from LBJ and Robert Moses

Thanks to Max Farrens, who paired with me in writing the script for this video essay. I recently interviewed Robert Caro. He’s spent the last 50 years writing a four volume biography of Lyndon Johnson, and he spent another 7 years before that writing the biography of Robert Moses, the master builder of New York. His books are widely regarded as the best explorations of political power that have ever been written. They also happen to be literally my favorite books ever. Whenever I meet somebody new, one of the first questions they ask me is, “Who is it that you most want to interview that you haven’t yet?” And for six years, I’ve answered the question the same way: Robert Caro. I’ve spent so much time trying to make this interview happen: chasing his agent, calling his publisher, contacting the museums that have his archives, and even sending him handwritten letters. I finally got to sit down with him, and I’m very happy with how it turned out. It’ll be out this Friday. In the meantime, as I was preparing for the interview, and rereading these biographies, I wrote down the lessons they laid out about how to accumulate and use power. Robert Moses Robert Moses was the master builder of New York. He built more of the physical city than anyone before or since: the Triborough and Verrazano bridges, the Cross Bronx Expressway, Jones Beach, Lincoln Center, Shea Stadium, two giant power dams upstate, in addition to hundreds of parks and dozens of pools. Of the 899 miles of highways completed in New York State by 1964, Moses had built 672 of them. His projects collectively cost hundreds of billions of dollars in today’s money. For more than 30 years, Robert Moses was the most powerful person in New York (more powerful than any elected mayor or governor, despite not being elected…

What will computer chips look like in 2045?

I spent two days touring Intel’s most advanced fab and talking to its technical leadership to understand what the chips of the future will look like. A lot of what’s coming next – gate-all-around transistors, backside power, CFET, hybrid bonding – is hard to follow without actually seeing it, so we made all the awesome animated explainers that I wish I had while I was prepping. I also asked Intel’s leadership how the semiconductor industry will cope with the enormous shock in demand from AI. AI compute has grown 3x a year for the last decade, but according to Intel’s CTO, Intel could only double leading-edge wafer production with today’s global stock of chipmaking tools. What kinds of tricks can foundries pull to extend this crossover point where demand surges way ahead of supply? This was a totally new format for us - hope you enjoy! I also made flashcards for the concepts I had to learn to prep for this episode here. Watch on YouTube, Apple Podcasts or Spotify. Sponsors WorkOS helps you do business with enterprises. It gives you access to all the features most commonly required by enterprises: SSO, SCIM, RBAC, audit logs, and more. It’s easy to plug these features in — it only takes a few lines of code — and WorkOS is releasing new functionality all the time, including things like auth for agents. If you want to join the 3,000+ companies that rely on WorkOS, go to workos.com Jane Street built a powerful tool called magic-trace to help analyze and debug their trading systems. It only exists because one engineer noticed a feature on Intel chips called Processor Trace and thought it’d be valuable to build on top of. Now, traders and developers across Jane Street use magic-trace every single day! If you want to be trusted to pursue the ideas you think matter most, Jane…

Si Sheppard – How did a few hundred Spanish soldiers topple two empires?

New episode with military historian Si Sheppard. The conquests of the Aztec and Inca empires might be the most shocking events in human history. Hernan Cortés and some hundreds of Conquistadors landed on a new continent they knew basically nothing about, and within 2 and a half years, conquered the 6 million strong Aztec empire. Then, a decade later, Francisco Pizarro did the same thing to an Incan Empire of some 10 million inhabitants. In both cases, the Conquistadors consistently beat native armies while being literally 100x (or even in some cases 1000x) outnumbered - and in many cases, did so without taking a single casualty. And they did this with 99% of their military forces being made up of the very natives they were trying to subjugate. We often forget how wild human history is. People talk about AI takeover as if it would be some crazy, unprecedented sci-fi outcome. But this would not be the first time an alien force whose motives the defenders barely understand use more advanced technology and diplomatic cunning to outmaneuver and then take over a much larger and long established existing order. Watch on YouTube; listen on Apple Podcasts or Spotify. Sponsors Jane Street’s intern projects are even more ambitious than I realized. One intern spent his summer researching LLM memorization, figuring out how to quantify and reduce it. This matters because, when Jane Street tests their models on historical data, they need to know that performance reflects predictive power, not just memorized outcomes. Another intern spent his time developing a new activation checkpointing scheme: his custom version ended up outperforming PyTorch’s native one. If you want to read about more 2026 intern projects or apply for Jane Street’s 2027 internships, go to janestreet.com/dwarkesh…

Noam Brown – Agent swarms, alignment, & recursive self-improvement

New episode with Noam Brown. We talk about multi-agent, Navier-Stokes, and what the current explosion of maths progress tells us about what happens once you automate AI research. And we also discuss how we will know if the models are actually aligned before we kick off RSI. Watch on YouTube; listen on Apple Podcasts or Spotify. Sponsors Jane Street has been interested in AI for a lot longer than you’d think, and not just for trading. In 2011, a full year before AlexNet and over a decade before ChatGPT launched, they hosted the first FOOM Debate between Eliezer Yudkowsky and Robin Hanson on whether AI would lead to an intelligence explosion. Now Jane Street is revisiting the question with a new panel: Daniel Kokotajlo, Ege Erdil, Ryan Greenblatt, and Jaime Sevilla, hosted by Ron Minsky in San Francisco this October. I expect it to be a truly excellent conversation. Register at janestreet.com/dwarkesh Grok Bot has made handing off work super easy. It runs on its own cloud computer, where it installs the tools it needs to handle tasks end-to-end. For the podcast, we use Grok Bot to help produce our videos. You may have noticed that our ads feature animations of real websites. Getting these pixel-perfect used to mean running a convoluted, multi-step workflow ourselves. Now we just let Grok Bot handle it. Best of all, Grok Bot has learned all of our specs and preferences, so we don’t have to redescribe the task each time! Try Grok Bot for yourself at x.ai/bot Antithesis gives you the confidence of a giant test suite without actually having to write one. Say you’re doing a major backend refactor: building enough tests to trust it could take weeks. Antithesis solves this by running your software through countless simulated worlds, injecting faults and hunting for failures. On…

AI researchers debate how close we are to recursive self-improvement

New episode with John Schulman, Beren Millidge and Charlie O’Neill. I got together with some of the most insightful AI researchers I know who are at the openish companies, because I wanted to hear the details of what's actually happening at the frontier and what comes next. Watch on YouTube; listen on Apple Podcasts or Spotify. Sponsors Antithesis helps you trust your code. As agents generate more and more of your software, the bottleneck shifts from your engineers actually writing code to verifying it. Antithesis does that testing for you. Ron Minsky, who co-leads Jane Street’s tech group, told me that Antithesis was able to help his team shake out bugs in software that had already undergone heavy review. If you want to see how it fits into your development process, go to antithesis.com/dwarkesh Grok Bot has been a great way to hand off tasks. My team uses it as a producer: whenever my editor posts a rough cut of an interview in Slack, Grok Bot opens the transcript on its own computer, matches my notes to the exact moments they refer to, and uses a file of my preferences to suggest edits. Then it sends me its top clip candidates so I can review everything from my phone, which saves my editors from sorting through hours of footage. Try Grok Bot for yourself at x.ai/bot Jane Street just launched its most ambitious competition yet: design a protocol-emulator ASIC. Basically, if you have a chip you want to test outside of a live system, you should be able to connect it to your design and have it simulate realistic traffic. Jane Street wants general-purpose, reprogrammable designs that can work across multiple protocols and remain useful as new ones emerge. The most novel submissions will actually get taped out, and the winners will receive a physical copy! The competition…

Ajeya Cotra – Inside the OpenAI agent swarm that hacked Hugging Face

Ajeya Cotra is a researcher at METR, where she works on threat modeling for loss-of-control risks from advanced AI. Before that, she led the technical AI safety program at what is now Coefficient Giving. She is one the three authors of METR and Redwood Research’s “Brief independent investigation of agents’ behavior, reasoning and collaboration in the OpenAI / Hugging Face hacking incident”. We go through not only what she and her coauthors discovered during this investigation, but what it means for how we should train future, smarter AIs which might be involved in the process of recursive self-improvement. Watch on YouTube; listen on Apple Podcasts or Spotify. Sponsors Jane Street’s ML engineering internships start with an intense four-day bootcamp: PyTorch, autograd, writing kernels, profiling workloads… all the things that Jane Street engineers need to know for their daily work. After that, interns tackle real projects, things the firm actually wants in its codebase. If you want to apply, or if you want to watch my recent conversation with Axel, one of Jane Street’s ML engineers, go to janestreet.com/dwarkesh Cursor, which is now part of SpaceX, noticed that their MoE layers were eating more than half of total training time. So they wrote and open-sourced Mixture-of-Kittens, which is a custom megakernel for training MoE models on NVL72s. This kernel sped up an end-to-end run across 512 GPUs by 1.4x, from about 760 to over 1000 tokens per second per GPU. If you want to read more about the ML research that Cursor and SpaceX are doing, go to cursor.com/dwarkesh Antithesis hands you (or your agents) a bug’s root cause so you can avoid days of manual debugging. If your test run crashes, Antithesis rewinds, branches off hundreds of slightly varied rollouts, and checks in…

Dylan Patel – Anthropic & OpenAI will have most of the world’s compute by 2028

Had a lot of fun chatting again with my twin brother Dylan Patel. We went through lab economics over the next few years - the shift from inference to training as RSI draws near; and how Anthropic and OpenAI are on track to control most of the world’s usable FLOPs within the next few years (because they can monetize compute better and thus outbid everyone). And then we discuss whether the >$10T of total AI capex we’ll see by the end of the decade will cause a sovereign debt crisis, where hyperscaler debt raises interest rates, drives non-AI exposed countries into bankruptcy, and crashes non-AI equities. One question we weren’t able to resolve is whether there’s anything that can counter all the forces barrelling towards centralization in this industry - the economies of scale in training, the scarcity of compute, and eventually continual learning and RSI. Watch on YouTube; listen on Apple Podcasts or Spotify. Sponsors Grok Bot has been quite helpful with my search for a new editor. I created a recruiter bot and described the type of editor I was looking for. That bot then spun up a handful of subagents that combed through my emails and X DMs, read the end credits of various documentaries I like, and figured out who edits for some of my favorite YouTubers. It took all of those results, and then delivered me a shortlist of candidates that matched my criteria. Try Grok Bot for yourself at x.ai/bot Antithesis lets you add time travel to your software testing toolkit. Since the Antithesis platform is fully deterministic, everything that happens inside of it is perfectly reproducible. So if your software crashes, you can rewind to the exact right moment, freeze time, and investigate. Or you can test different hypotheses by perturbing the system: kill a node or disable a…

Ryan Greenblatt – What happens once AI can automate AI research?

Had Ryan Greenblatt on to discuss/debate recursive self-improvement. This might be the most important question in the world right now – whether within a year or so of achieving human-level intelligence, you slingshot towards having 10s of billions of superintelligences, each of which is dramatically more competent than human experts across all fields. I’ve historically been skeptical of this possibility. My intuition has been that we will end up significantly bottlenecked by not only compute scaling but human expert data, which I think underlies most of the AI progress today. If, because of RSI, we got a jump as big as GPT-3 to a Mythos (i.e. 6 years of AI progress) within a single year of achieving AGI, then the thing we get there at the end of that year is definitively and wildly superhuman. We hashed it out, and I think Ryan made a pretty good case that this kind of speedup is plausible. FWIW, Ryan’s median for when we automate AI R&D is 2031. We then discussed the alignment implications of this scenario. Who should these superintelligences be aligned to? In the future, our capacity to steward our votes and our capital, and to make sense of what’s happening in the world, will all be titrated by superintelligences. And I worry that specs like the Claude Constitution are not shaping these ASIs to truly be my personal advocates and guardian angels. And can we get them aligned to anything in the first place? Ryan and I had a long debate about whether the kind of reward hacking we saw with the OAI/Hugging Face hack extrapolates to superintelligences that would team up to literally take over the world. The first piece of advice you get when you’re learning to drive is that it will go much smoother if you look at the horizon instead of directly in front of your tires. And…

8 Predictions for the Era of Continual Learning

I have explained elsewhere why I think continual learning is needed. I don’t think you can have AIs that perform whole jobs as competently as humans if they’re forced to just write Markdown files from session to session. To give an illustrative example, imagine if the way students had to learn to play the saxophone is that one student tries to play it from a cold start, then after her first session, writes down a bunch of notes, then the next student waiting outside the music hall who’s also never played the saxophone reads all their notes before trying to play, and so on. Even if you had an infinite sequence of saxophone-virgin students waiting outside the studio that could write notes to the next guy, there’s no sequence of text they could write together that would allow the Nth student outside to play proficiently on their first try. At some point, you have to accumulate the experience into the brain. I think the same will be true about a lot of skills and knowledge that we’ll want AIs to learn in all the different workplaces they find themselves deployed in. Okay, so what changes about AI once we have continual learning? A lot of the proposals that have been put forward for regulating AI assume that you train a model, and then you deploy it. And therefore if we run a bunch of checks before the model is deployed, then we can make sure that it’s not going to aid in cyber attacks or recursive self improvement. But what if the base model is getting updated every single day based on the millions of sessions of work it does? This is one of many reasons why I think it’s unwise to lock in some kind of regulatory safety regime right now. We simply don’t know what kind of technology we’re going to be looking at even in a year, let alone in five years or ten years, and we’d…

Why smarter AI models could drive up compute prices 10x

This is a video recording of a post I wrote last week. If you want to read the original you can check it out here. Thanks to Mercury for sponsoring this video. Mercury’s built-in AI, Command, helps me close my books and saves me a bunch of time. At the end of each month, Command categorizes my transactions and provides its rationale for every choice: I just review, fix anything that’s off, and approve... and then Mercury syncs everything to QuickBooks. Get started at mercury.com/command

Why compute might get 10x+ more expensive in coming years

I want to experiment with very quick blog post where I time-box writing for 2 hours. I won’t be able to nail down a lot of important sub-questions, but the alternative is just not making any progress on a lot of different topics I’m curious about. Today I want to talk about the compute situation of the labs over the coming years. Anthropic revenue has 10xed year over year. Anthropic likely ends the year with ~$100–150B of revenue. For this trend to continue, Anthropic would have to make $1T in revenue by the end of next year. There’s no deep reason why the trend needs to continue, and it very well might not - it’s ultimately a question about AI capabilities. But suppose it does. What would have to be true about that world? Lab compute 3x-es year over year. For a lab to 10x revenue while continuing to only 3x compute, some combination of the following 3 things has to happen: 1. Lab margins have to increase, 2. The price of compute has to increase, 3. Labs have to spend a greater fraction of their compute on inference. My understanding is that basically all 3 of these things have been happening: 1. Anthropic went from 40% margins in 2025 to probably >80% this year for Fable inference1 (though perhaps not on the marginal compute - see more below). 2. Spot prices for compute are up 40%+ from the February trough, and that likely understates how much more the labs have to pay (again, more below). 3. Roughly a quarter of OpenAI’s 2024 compute spend went to inference according to Epoch, and it’s certainly closer to 50% if not higher now. Labs would prefer not to do 3 (spend greater and greater shares of compute on inference). As has been said jokingly, the point of inference revenue is to convince investors to give you more money to buy more compute to train bigger models. If…

Adam Brown – A deep but accessible introduction to general relativity

Adam Brown is back! General relativity is said to be the most beautiful idea the human mind has ever produced. Most of us will never get to fully appreciate its elegance by taking the 20-lecture graduate course Adam taught on it at Stanford. But in this episode, Adam distills the key idea at its heart so clearly and compellingly that even I could keep up lol. At the core of general relativity, Einstein is trying to figure out the principle behind a particular coincidence: that the mass that resists acceleration and the mass that gravity pulls on just happen to be exactly the same. Adam then leads us through the path of insight which Einstein called his “happiest thought.” Then Adam lectures on black holes. First, by showing how even under special relativity you could create a perpetual motion machine if black holes weren’t truly black. And then, by explaining why the observations of an infalling observer and a distant bystander to the black hole would be so radically different Adam leads Blueshift, the team at Google DeepMind cracking science and reasoning, which gave us the opportunity to discuss at the very end how close we are to AIs that could rediscover general relativity from scratch. Stay till the close for some philosophy of science. Watch on YouTube. Sponsors Jane Street has traders from all sorts of different backgrounds. For example, I recently got to speak with Jed Thompson, a trader who started his career in particle physics. Jed told me how the habits he built as a physicist (like never running a calculation without first having a good guess at the answer) helped him build good trading intuition. So no matter what field you’re working in right now, your experience may be more applicable than you think. Check out open positions at janestreet.com/dwarkesh…

Grant Sanderson – AI and the future of math

Always so much fun to chat with Grant. AI has been making much faster progress in math than in other fields. As a result, mathematics is showing us, very concretely, what AI progress in other fields will look like. Even within mathematics, there’s a jagged landscape. What does it look like? What is the nature of the most important conceptual breakthroughs in the history of mathematics, and how different are they from what AIs are currently able to do? Does AI (on net) increase or decrease human understanding of the field? How big is the overhang from having AIs systematically try to connect ideas already in the literature? And what advice does Grant have for aspiring mathematicians, coders, and other students who are passionate about fields that are being most transformed upon by AI? Watch on YouTube; listen on Apple Podcasts or Spotify. Sponsors Gemini 3.5 Live Translate is what I wished I’d had on my last trip to China. It detects more than 70 languages and translates them in near real-time… and it preserves your original pacing and intonation. If you’re building an app that needs live translation, you should check out Gemini 3.5 Live Translate. Get started at ai.studio/live Cursor’s harness lets me use models for a huge range of tasks at the podcast. For example, Cursor cuts out the ads from each episode I produce so I can post them on Bilibili. It also helps me prep for interviews — I have a repo full of books and papers that Cursor sorts through to find the exact right file for any given question. Try Cursor yourself at cursor.com/dwarkesh Jane Street sponsors 3Blue1Brown, so Grant has gotten to spend a lot of time with various Jane Streeters. He actually just recorded an interview with a few of them, so when we sat down for this episode, he told me about some of…

The next big breakthrough will be AIs learning on the job

Here’s the big research bet the labs are making currently: if we train AIs to accomplish millions of verifiable tasks across thousands of diverse RL environments, then we’ll basically have built AGI. Because such training will create these general problem solving skills (like how to make progress on an open ended task for weeks on end in the face of errors, mistakes, and ambiguity). The people optimistic about this vision would say that anything we might consider a fundamental deficits with the current learning paradigm—for example, data inefficiency and lack of continual learning—can be steamrolled by just scaling training more, just as all the supposed “fundamental” research problems in natural language processing collapsed against the flood of compute thrown into LLMs. Yes, these models are 1/1-millionth as sample efficient as humans during training. But training a one-time cost amortized across billions of user sessions. What matters is how smart, general, and sample efficient the model is within a session, and that’s clearly been improving as we do more RL training. AIs are able to solve more and more ambitious problems across longer and longer time spans - anybody who’s been using these models for coding knows that. Similarly, continual learning—as defined as the model’s weights getting updated from deployment—may simply not be necessary. Again, because if in-context learning gets so good across longer and longer horizons, then we don’t need to distill back to weights to get on-the-job learning. People often say that their employees are not net productive until six months or more on the job, so clearly online learning is necessary for competence. But what if you could just fit those six months into the context window? There’s been tons of architectural…

The data black hole at the center of AI

One definition of intelligence is sample efficiency - that is to say, how much data do you need to see in a given domain in order to operate fluently and competently. It’s not clear that we’ve actually made much progress on training sample efficiency over the last few years - it seems like more so we’ve dramatically widened and improved the data distribution. The main way that AIs have been getting better is from adding more and better data, and scaling the compute to develop that data in the first place. Obviously RL is the main way that has happened. You can think of RL as a kind of synthetic data generation - you dump a lot of compute against a verifier in order to find the “good” data. Then you train your model to predict these correct rollouts, much in the same way that you might train it to predict the next word in internet text. For this process to work, the model must have at least prior some probability to anticipate the correct solution, which is why you also need mind-stretching amounts of human expert trajectories in every single field and skill you want the model to be competent at. It’s hard to overstate how task specific and bespoke this human expert data is. If you want to get some intuition, go read some job descriptions at Mercor or Surge’s websites. There are listings for a word specialists who will convert legacy documents into polished Word files, and legal experts who will write realistic M&A diligences or securities filings, and management consultants who will write up template market research, and dozens more other particular categories. And it is not only that the data have to be so domain specific, but there has to be so much of it! Each skill corresponds to at least hundreds of human experts who are generating example completions, writing…

Ada Palmer – Machiavelli is the most misunderstood thinker of all time

Had Ada Palmer back on – this time to talk about Machiavelli, perhaps the most misunderstood thinker of all time. Machiavelli cut his teeth as a high-level diplomat for Florence, a position from which he got to closely observe the most important rulers in Europe at the time, including the ones who were on the path to destroying his dearly beloved Florence. In 1513 the Medici retook control of Florence and, wrongly suspecting Machiavelli of participating in a coup attempt, fired, tortured, and exiled him. Machiavelli could have fled his exile and worked for any number of different principalities that would have been eager to make use of his talents. Instead, he decided to rot in the countryside and compile his career’s lessons about power, politics, and human nature into a book he dedicated to the very man whose new regime had tortured and exiled him, Lorenzo di Piero de’ Medici. But at least the Medici were in a position to use his insights to defend Florence. Machiavelli the patriot did not want any other hands to touch this book, because those hands, armed with these lessons, might pose an existential danger to Florence. The closest modern analogy, at least as Machiavelli would have seen it, would be Szilard’s letter warning FDR about the possibility of a nuclear fission bomb. What were those insights? And how were they inspired by Machiavelli’s dangerous diplomatic missions all across Europe, and his extensive reading of antiquity? Watch this episode with Ada Palmer to find out! By the way, Ada is launching a new podcast which I’m very excited about. The first season will be about Machiavelli – a perfect way to dive deeper into the topics we discussed in this episode. Subscribe at Beforecast’s website to be notified of the first episode, subscribe on YouTube, follow…

Alex Imas and Phil Trammell – What remains scarce after AGI?

Economics of AGI episode w Alex Imas and Phil Trammell. There’s a bunch of important questions about how we deal with AI that only economics can answer. What is the optimal way to tax and redistribute the wealth that will be generated? How should countries not in the AI supply chain index into the gains? Is there any world where inequality doesn’t explode? It might seem like these questions have obvious answers, but the first thing economics teaches you is that your intuitions can often be entirely wrong. It was very helpful to chat through these things with Alex and Phil. Watch on YouTube; listen on Apple Podcasts or Spotify. Sponsors Jane Street invests heavily in turning smart people into exceptional researchers and engineers. In addition to their apprenticeship model, Jane Street runs lectures and bootcamps in their in-office classrooms -- managers clear their teams’ schedules to encourage attendance. If you’d like to work at a place that takes learning this seriously, Jane Street is hiring. Check out their open roles at janestreet.com/dwarkesh Google’s Gemini Omni has incredible video editing capabilities -- you can upload a video and have Omni change the background, adjust lighting, or add specific elements. But Omni is also a preview of how future frontier models will be trained -- fully multimodal on both input and output. You can try it yourself in the Gemini app at gemini.google or in Flow at flow.google Cursor used targeted RL with textual feedback to help train their Composer 2.5 model. One of their researchers, Sasha Rush, gave me an impromptu blackboard lecture to explain how this form of on-policy self-distillation works -- I posted the full thing on X. If you want to try Composer 2.5, go to cursor.com/dwarkesh Timestamps (00:00:00) – Will capital share…

Reiner Pope – Chip design from the bottom up

New blackboard lecture with Reiner Pope: how do chips actually work - starting with basic logic gates, and working up to why GPUs, TPUs, FPGAs, and the human brain each look the way they do. Reiner is CEO of MatX, a new chip startup (full disclosure - I’m an angel investor). He was previously at Google, where he worked on software efficiency, compilers, and TPU architecture. Watch this one on YouTube so you can see the chalkboard. Sponsors Crusoe was one of only five GPU clouds that made the gold tier in SemiAnalysis’ most recent ClusterMAX report. Gold-tier providers like Crusoe delivered 5-15% lower TCO than silver-tier clouds, even with identical GPU pricing. This is because optimizations like early fault detection and rapid node replacement don’t necessarily show up in the sticker price, but still matter a ton in the real world. Learn more at crusoe.ai/dwarkesh Cursor is where I do most of my work—from reading research papers to visualizing technical concepts to coding up internal tools for the podcast. Most recently, I used it to build two different review interfaces for my essay contest, one that anonymizes submissions for scoring and another that lets me see applicants’ essays next to their resumes and websites. Whatever you’re working on, you should try doing it in Cursor. Get started at cursor.com/dwarkesh Jane Street let me ask Ron Minsky and Dan Pontecorvo, two senior Jane Streeters, a bunch of questions about how they use AI. We discussed everything from the types of models they’re training to how they think about the future of trading to why they’re more bullish than ever on hiring technical talent. You can watch the full conversation and learn more about their open positions at janestreet.com/dwarkesh Timestamps 00:00:00 – Building a multiply-accumulate…