⚙️ Behind the build of self-improving tax agents with Codex We co-built Tax AI with @ThriveHoldings around tax prep workflows so when reviewers fix any errors, Codex can trace the failure, improve the system, and test the change before it ships. openai.com/index/building…↗

Sandboxes are becoming the OS for agents. This is because agents will be more persistent and stateful. I go deep in my Substack: isolation primitives, performance, portability, architecture, build vs buy, market dynamics. Give it a read: …↗

Over the past year, we've been building our own internal agent infrastructure at YC: over 350 tools, self-improving skill loops, and a shared organizational brain that gets smarter overnight. In this episode of the @LightconePod, we sat down with YC General Partner Pete @koomen…↗

Given the recent burst of activity around enterprise pricing and contracts, I think April 2026 was the month when both OpenAI and Anthropic found product-market fit simonwillison.net/2026/May/27/pr…↗

Model capabilities are converging. The best riders win. tomtunguz.com/harnessing-ai/↗

.@coatue_thomas describes how a meeting with Steven Spielberg eventually taught him how to pitch companies. "Steven said, 'Every great story can be pitched in three sentences, no matter what the story was.'" "In three sentences you got the whole movie. And what I realized is it…↗

introducing howtoeval dot com. the no-bullshit guide to eval'ing AI agents. from personal experience, and from working with the best companies in the world. there's even a quiz. link below.↗

good news: /goal in codex has solved all my problems bad news: i'm sitting here twiddling my thumbs while the agents do all my bidding it's no secret i'm a little bit obsessed with codex, and /goal is a big part of that. i put together a 30m ep on /goal including: - what it is…↗

OpenAI and Anthropic are effectively telling the market they can't solve every problem with a generic AI coworker. You don't pour billions into massive forward-deployed joint ventures if you think the next model release is going to take care of it. In the cloud supercycle, semi…↗

Why is the creator of OpenCode pretty skeptical about AI productivity gains, and the hype around AI? A very conversation @thdxr (and lots of truth bombs:) Timestamps: 00:00 Intro 07:03 Dax’s path into tech 09:04 Early startup experience 13:16 Getting involved with open source 1…↗

We’ve been putting a lot of effort into making Claude Code more responsive & reliable. Here’s an update on everything we’ve done:↗

Private MCP servers 🤝 OpenAI products Your team can keep MCP servers inside your network while ChatGPT, Codex, and the Responses API connect through outbound-only HTTPS. 🔗 developers.openai.com/api/docs/guide…↗

Research 1.2 is out now!↗

We've created the world's fastest PDF parser ⚡️ And it's more accurate than any other open-source, model-free PDF parser out there (pymupdf, pypdf, markitdown, pdftotext, opendataloader, pymupdf4llm) Introducing LiteParse v2 - we rewrote the entire library into Rust and adapte…↗

Slippery Slop We use agents for everything at Gumloop. This is not a brag. We're seeing efficiency boosts but it's also causing a whole new set of problems. We're experience "agentic growing pains" that a more standard company might only see in 6 months to a year from now. The…↗

Proud of this one. We shipped a new Institutional Holdings API. This data comes from 13F filings, which is a nightmare to parse at scale. You must normalize tons of data. Funds will report "BERKSHIRE HATHAWAY", "BRK", "BRK.A", and the CUSIP across different positions. Resolv…↗

Introducing the newest Coral board, for efficient, on-device AI! Check out the demos in the video: - On-board speech translation - Natural language controlling hardware - Vision & sound generating music↗

codex power-user best practices: - a few different "pulse" threads that run every morning to check the status of stuff i care about, e.g. proof metrics, all company meetings, etc - a "log" thread for ongoing, everyday activity i want to track. for me that's my "writing log"—wan…↗

Figma Make, now on your local code In limited beta starting today, you can visually edit and ship changes by connecting Make to your codebase At Figma, we use our products to design in every way: design layers, prototypes, and now, production code↗

Introducing the Cursor Developer Habits Report. We’re sharing some of our findings on how software development is changing. It’s based on the most comprehensive dataset on AI coding in the world, across all model families.↗

R&D Part 1: Here to Win↗

Introducing Claude Opus 4.8: it builds on Opus 4.7 with sharper judgment, more honesty about its own progress, and the ability to work independently for longer than its predecessors. Available today at the same price.↗

New in Claude Code (research preview): dynamic workflows. Claude writes an orchestration script on the fly, then spins up a large fleet of coordinated subagents in parallel to take on your most complex tasks. Use the word "workflow" in a prompt to get started.↗

We've raised $65 billion in Series H funding at a $965 billion post-money valuation, led by @AltimeterCap, Dragoneer, @Greenoaks, and @sequoia. This investment will help us advance our research and expand our capacity to meet growing demand for Claude.↗

Opus 4.8 is a GAMECHANGER Here's the full vibe check from @every:↗

How are coding agents changing software engineering? Yapped for 15 minutes about new Cursor data we published, including: 1. Why lines of code is an imperfect measure of AI progress 2. Balancing intelligence/cost/speed for models 3. Code reviews with "Mega PRs" (1000+ lines)↗

Before we ship a new model, these teams try to break it. They build with it, push it to its limits, and tell us where it falls short. What they find makes the final model better.↗

Opus 4.8 launched and then it LIED TO ME (well, hallucinated 3x) great at one shot, but after that... no hype take now on yt: youtube.com/watch?v=h0gZf1…↗

someone hit me up about the new "claude dynamic workflows" feature, claiming "see, multi-agent works" But really, the launch of this feature proves the exact point that I made back in June of 2025, along with @walden_yan, @tobi, @karpathy, and many others: Deterministic workflo…↗

Google's free 5-day AI Agents course is back, and this time it's all about vibe coding with agents. The last one had 1.5M learners. Here's what the course covers: → Day 1: Agents + vibe coding. Build agents with Google Agents CLI and your coding agent. → Day 2: Tools + intero…↗