Apuntes de ingeniería desde el terreno.
Ensayos y notas de campo sobre IA, ingeniería de software, diseño y el oficio de construir equipos de producto que entregan. Escrito por los ingenieros que hacen el trabajo. Publicaciones en inglés.
The First Frontier Model Built and Withheld: Reading Anthropic's ASL-4 Call
Anthropic announced a frontier model on April 7 and in the same breath said the public couldn't have it. The first ASL-4 trigger in industry history, and a working preview of how frontier AI deployment actually changes from here.
Opus 4.7, /ultrareview, and the New Floor for AI-Integrated Products
Anthropic shipped a coding model that resolves 87.6% of real GitHub issues and a review command that changes what a production PR pipeline should look like. The bar moved again.
Verifiable Rewards Didn't Kill the Expert-in-the-Loop. They Sharpened It.
RLAIF costs less than a cent per data point. Human feedback costs a dollar. The frontier labs are still spending a billion a year on humans. Here is why the math works.
The Three-Model Routing Playbook: How Product Teams Actually Ship With AI in Q2 2026
The winning pattern isn't picking the best model. It's routing the right workload to each of three models — and having an eval harness honest enough to catch when that changes.
HappyHorse and the Shift Nobody Saw Coming in AI Video
Alibaba quietly took the frontier video-generation crown the same month OpenAI killed Sora. That isn't a leaderboard story — it's a supply-chain one.
Canva's AI 2.0 and the Intent-to-Artifact Era
The headline was conversational design. The actual news is the cost structure — and what it says about every AI feature on every 2026 roadmap.