Author: jbetker

I had a pretty incredible vibe coding experience with o3 today. As I’m sure many of you have also had recently – whether with o3, or Claude or Gemini. I was iterating on a problem with it over a couple of hours. I asked it to come up with an idea for a novel algorithm…

A Transformer is a stack of alternating Attention and MLP layers through which data embedded as high dimensional vectors is fed. A Mixture of Experts (MoE) Transformer substitutes the MLP layer for an “MoE Layer”. Let’s dive into what that means. The “MLP” is one of the oldest neural network architectures, consisting of two linear…

Over the past decade, some of the most remarkable AI breakthroughs—AlphaGo, AlphaStar, AlphaFold1, VPT, OpenAI Five, ChatGPT—have all shared a common thread: they start with large-scale data gathering (self-supervised or imitation learning, or SSL) and then use reinforcement learning to refine their performance toward a specific goal. This marriage of general knowledge acquisition and focused,…

ARC is benchmark developed to test out of distribution reasoning and common sense in general solvers. It is specifically designed to be: Easily solvable by most humans Not amenable to any kind of brute-force solvers (e.g. try every permutation of a solution) Not able to be solved with rote memorization The designers of ARC achieved…

Folks in the field of AI like to make predictions for AGI. I have thoughts, and I’ve always wanted to write them down. Let’s do that. Since this isn’t something I’ve touched on in the past, I’ll start by doing my best to define what I mean by “general intelligence”: a generally intelligent entity is…

I’m very pleased to show the world GPT-4o. I came into the project mid-last year with Alexis Conneau with the goal of scaling up speech models and building an “AudioLM”. We knew we had something special late last year, but I don’t think either of us imagined that we’d able to pull off something as…

At my job, I’m currently in a cycle that is involving working with software engineers quite a bit. One thing that has happened a number of times is that a software engineer will bring up “research code” with a condescending tone. The implication is that research code is messy, unreadable, and difficult to maintain. I…

From 2019-2021, I was fascinated with neural network architectures. I think a lot of researchers in the field were at the time. The transformer paper had been out for a little while and it was starting to sink in how transformational it was going to be. The general question in the air was: what other…

Google has a neat internal website called “Rules of Thumb”, which compares the marginal cost of computational resources to the unit of a “SWE”. “SWE” refers to “Software Engineer” – which itself is the marginal cost to pay salary and benefits to the average engineer at the company. Throughout design docs at the company, you’ll…