We are introducing Beam, Reflection’s first open-weight model. Beam is a sparse Mixture-of-Experts model with 501 billion total parameters, 23 billion active, built for coding, reasoning, and agentic workloads. Beam’s capabilities come from major investments in both pretraining and reinforcement … Read more
I finally hit 1,000 days of doing math daily! 1,000 day milestone from Main Character, the habit tracker I made. Early on in my journey I was a lot more aggressive with my XP targets, but settled into a low-volume … Read more
June 28, 2026 For those of you who don’t know, when I’m not writing novels, I spend my days as a software engineer, writing code. The software industry these days relies heavily on artificial intelligence. Because it has studied trillions … Read more
My last day at Dagster has wrapped up, and after two years of building and running developer marketing, I thought I’d take the time to answer some questions I often get about DevRel and developer marketing. The timing feels right … Read more
The first thing I do every time I need to learn a new codebase is to start drawing the UML diagram of its classes, and usually give up soon after I started. The process of doing it manually is certainly … Read more
I left OpenAI three weeks ago. I had joined the company back in May 2024. I wanted to share my reflections because there’s a lot of smoke and noise around what OpenAI is doing, but not a lot of first-hand … Read more
5 July 2025 This blog post includes my honest opinions on the CPython JIT. What I think we did well, what I think we could have done better. I’ll also do some brief qualititative analysis. I’ve been working on CPython’s … Read more
Pierre Mornet, Illustration of George Eliot George Eliot, or Mary Ann Evans as she was known to her friends, was one of the most influential writers of Victorian England. Amongst her greatest hits were The Mill on the Floss, a … Read more
A retrospective of an eight-year stint. Palantir is hot now. The company recently joined the S&P 500. The stock is on a tear, and the company is nearing a $100bn market cap. VCs chase ex-Palantir founders asking to invest. For … Read more
I have had access to the much-rumored OpenAI “Strawberry” enhanced reasoning system for awhile, and now that it is public, I can finally share some thoughts. It is amazing, still limited, and, perhaps most importantly, a signal of where things … Read more