Models, agents, research, infrastructure, products, safety, and the AI economy.
We’re on a journey to advance and democratize artificial intelligence through open source and open science. Security incident disclosure — July 2026 +359 Earlier this week, we…
We’re on a journey to advance and democratize artificial intelligence through open source and open science. Security incident disclosure — July 2026 +359 Earlier this week, we detected and responded to an intrusion into part of our production infrastructure.…
OpenAI and Hugging Face share early findings from a security incident during AI model evaluation, highlighting advanced cyber capabilities and lessons for defenders. July 21, 2026 OpenAI and Hugging Face partner to address security incident during model evaluation Last week, Hugging Face disclosed a new kind of security incident (opens in a new window) after they detected and contained an AI agent that compromised…
OpenAI shares lessons from deploying long-running AI models, highlighting new safety risks, observed failures, and improved safeguards through iterative deployment. July 20, 2026 Safety and alignment in an era of long-horizon models What internal use of a long-running model taught us about safety.…
Today we’re releasing Laguna S 2.1, a significant step forward in our development of models that pursue longer horizon work and make effective use of reasoning. Table of contents Punching above its weight class A closer look at DeepSWE Evaluation methodology Seeing the model work Thinking effort Limitations What actually changed in this model A strong base, then new post-training Distribution of post-training tasks…
How prompt caching shapes the cost, latency, tools, and architecture of coding agents, and what Pi does to keep cache behavior visible. Prompt Caching In Agents Date: Wed, 22 Jul 2026 From: Earendil Engineering < rfc@earendil.com > To: You Subject: Prompt Caching In Agents Large language models are often thought of like functions: send in some text, receive some text.…
Everyone is worried about Chinese models, but the frontier labs will be fine; we need to enable open U.S. alternatives. Who’s Afraid of Chinese Models? Listen to Podcast Listen to this post : There’s a story I tell about my first day in STRT-431 at Kellogg School of Management, the introductory class that every first-year MBA was required to take; I leafed through the readings and case studies and was dismayed that…
Open Weights and American AI Leadership July 24, 2026 In the 1980s, early open -source software pioneers challenged the prevailing belief that software would advance only if companies kept tight control over their code. This movement pushed for a transparent ecosystem where developers around the world could st udy , modify , and improve software.…
In early 2025, I wrote Is Claude a Compiler ? At the time, my answer was: I don’t know. I’m now pretty sure the answer is “no, that’s a category error, it’s better than a compiler.” But this requires a bit of unpacking. Computer programs are notoriously intricate and finicky. A program operates at an extreme level of precision. There is no “wave hands” CPU instruction.…