I tried asking myself what I'd learned after 40, and it turned out to be a lot of the most important stuff I know. At least 90% of what I know about startups, because I was 40 when we started YC. Plus everything I know about parenting and most of what I know about writing.↗

Either she lied about being sick or OpenAI is the new rest and vest lab↗

After deployment, we applied GPT-5.6 Sol to advance the frontier of efficiency by making itself more efficient to run. The results: - 20% lower serving costs from production GPU kernel improvements. - 15%+ better token-generation efficiency from improved speculative decoding.↗

Lilian Weng, the Thinking Machines cofounder who announced her departure earlier this week, citing startup-related stress and illness, is rejoining OpenAI. She'll be working on using AI to develop new models (recursive self-improvement). w/ @amir …↗

✅ Lilian Weng (@lilianweng) has joined OpenAI.↗

People keep on telling me that my message about AI is undercutting my own books. Those people do not understand how agents work and who actually controls them. You can't tell an agent to be clean. You have to measure the cleanliness that they produce and have them correct fail…↗

That work will change around AI is inevitable, but the way work changes is not. I think firms with a lack of imagination will see AI as an opportunity to cut people, but firms with the vision to expand human roles & make them better with AI will thrive. …↗

[1] software factories are super real but we need to be realistic. the factory aspects haven’t been cracked yet, the [3] innovators are toying around with discovering practices and pieces. if someone is selling you a factory rn and they aren’t in the super small cohort (ie. the…↗

Cursor is now on iPad. All the power of Cursor on iPhone, with more room to work with agents.↗

Never Compete. I was on with someone from our team at slow talking about competition recently… ‘how do you compete in venture capital’, etc… win deals. My honest philosophy? I hate competition professionally (love it in sport, but not business)…. And I think competition is espe…↗

Video Podcast is live. Turn any doc, link, or idea into a two-host video show with studio scenes, multi-cam cuts, and B-roll. Ready in minutes. Everyone else stops at audio. This is a show you can publish. Try it: app.heygen.com/apps/video-pod…↗

On harnesses, I vacillate between three beliefs: - the less harness, the better. Models are the magic - post training a model and harness is dramatically better and the model providers win - harnesses have real independent value from the model I have no idea which is right.↗

New project I built over the weekend with Grok Build: ~npm i drawesome It's the easiest way to add drawing tools to any React app with a simple, delightful toolbar. Smooth animations, thoughtful details, plenty of customization. Fully open source. Zero dependencies.↗

Launching Copper, a Mac app for capturing things you want to keep and prompts you want to try next while working with AI. The more I use AI, the more I find myself collecting little things I don't want to lose. You're in ChatGPT and think, "I'll need this later," but you don't…↗

10,000 human-days of modernization work. Done in 45 days. 45 day database migration. Done in 6 hours. See how @Comarch is building its own Software Factory. t.co/eaTqwor37o↗

Thought I'd try getting Opus 5 to build a Kart racing game after seeing what @mattshumer_ did. Still drops some frames but this is amazing what was competed just yesterday! Everything drawn from scratch programmatically with @threejs in the browser. Try it out here: …↗

Fable is really good at launch videos It essentially one-shotted this video. I told it to read my launch post and create a launch video. That's it. It ran for 46 minutes (without asking me any questions), found all the product logos, and spit this out. I then asked it to add…↗

This is BY FAR, the best game I've seen built with a Gauntlet Loop. Play it, along with tons of other games built with Gauntlet Loops here: somethingbig.ai/games Submit yours on the page! Or link it in a comment here and I'll add it :)↗

Pragmatic Leverage in the Software Factory This one is a bit of an addendum / side-quest to the recent series. It didn't fit cleanly into the main post so I'm publishing it standalone. It is referenced briefly in [Why Software Factories Fail](…↗

Introducing Replit Design. The next era of design, for everyone.↗

What's gone wrong with AI & labor — a thought experiment A thought experiment that I think helps explain much of what’s gone wrong with AI and labor: Imagine an alternate universe in which — for whatever reason — no one ever published source code online. The open source movemen…↗

"npx t3 connect" This one's been a lot of work. You can now set up remote control for T3 Code on any internet-connected box with literally one command. All for free. T3 Connect is a minimal open source tunnel layer allowing you to control T3 Code instances remotely without need…↗

We support this petition, signed by our CEO, several co-founders, and senior staff. Our own research on recursive self-improvement, published last month, points to the need for tools to deliberately pace the frontier of AI development so society can prepare. We’re glad to see b…↗

We quietly released the open-source Codex Security CLI, but Hacker News found it before we had a chance to share it here... You can now use it to scan repositories, track findings across runs, verify fixes, and add security checks to CI/CD. This is an early release, and we're…↗

tldraw canvas ➡️ interactive theme UI Demonstrating visual context understanding in Antigravity, the agent read the canvas mockups and built interactive code fast with 3.6 Flash⚡↗

3/ We open-sourced both skills:• Create — idea visual concept editable tldraw modules• Recreate — reference . source-faithful editable drawingMIT licensed. Issues and experiments welcome.t.co/g4txfZ5ePo We open-sourced both skills: • Create — idea → visual concept → editable tld…↗

whoever successfully rebranded ‘bots’ as ‘agents’ is a god-tier marketer↗

At the core of our mission is working through how to ensure increasingly powerful AI benefits everyone. We believe that, at some point in the future, AI acceleration for frontier model development may be so high that the world will need to pace the rate of AI advancement. We…↗

The first autonomous agent cyberattack is an unprecedented event that deserves unprecedented transparency. Today we’re sharing everything we can: a full technical timeline, an interactive replay, and how we used an open model to defend ourselves, so defenders everywhere can learn…↗

New Anthropic research: Discovering cryptographic weaknesses with Claude. Claude Mythos Preview has helped our researchers find weaknesses in cryptographic algorithms—the mathematical methods that are used to keep data private. Read more: anthropic.com/research/disco…↗