Plugins, Apps, MCPs at @OpenAI. Prev Director of Engineering @Shopify, co-founder and CEO @Stellate (acq. by Shopify), co-creator of styled-components.

Joined April 2014
2,361 Photos and videos
I don't think OSS projects making this explicit really changes anything, tbh. Yes theoretically before this any rando could have submitted a PR and gotten it merged. But in practice, nobody ever did. All of the open source projects I was involved with ended up being maintained by a tiny set of a handful of core contributors. Maybe 0.1% of contributions were truly from randos, and they were quite frankly always the least important contributions. The only thing that's changed is that randos are now automating slop PRs and projects are deciding to block them. That doesn't actually change anything about how OSS has always worked in my experience.
"A substantial patch used to imply substantial effort, and that effort was a reasonable proxy for good faith. That assumption no longer holds." ladybird.org/posts/changing-…
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A different way of saying this: open source has actually always worked this way, we just didn't state it explicitly.
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One could argue that the randos that did make meaningful contributions became core contributors, and so by blocking rando PRs you're closing off the pathway to becoming a core contributor. But I don't think that's true either. If somebody had an idea for a complex Ladybird feature that the core team had on their roadmap, forked Ladybird, implemented it well, then tweeted and said "I added this feature that I wanted to Ladybird come look at it"… there is a 0% chance the Ladybird team would consider adding them to the core team differently than before. The exact path might be different, but imo it's actually the same thing.
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Narrative violation: devtools are doing better than ever
Devtools are being minted right now.
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Max Stoiber retweeted
I’ve been dumping on OpenAI with low effort meme tweets that get too many views, but Codex is the best DevX acceleration product of all time and I wrote about it here: cpojer.net/posts/modern-engi…
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Six months at @OpenAI in one graph:
I wanna see people's pets on their profiles more than anything.
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Max Stoiber retweeted
Good thread on HN this morning on whether MCP is dead. Here’s the view from @mxstbr who leads this at OpenAI
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Alpha testing the new @pebble index 01 👀
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🚢 ChatGPT and Codex now support MCP server instructions! 🎉 MCP servers can return the standard `instructions` field to give Codex/ChatGPT server-wide/cross-tool guidance like: - "Always use validate_schema → migrate_schema for safe db migrations" - "Db connection tools are rate limited to 10 req/min" We pass the first 512 characters of your instructions to the model when it's deciding to use the MCP server. Happy building!
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Max Stoiber retweeted
One of the coolest things with Codex for Chrome is combining it with subagents so you can test things like multiplayer games! Available for both macOS and Windows. Happy Codexing
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Max Stoiber retweeted
May 7
Introducing GPT-Realtime-2 in the API: our most intelligent voice model yet, bringing GPT-5-class reasoning to voice agents. Voice agents are now real-time collaborators that can listen, reason, and solve complex problems as conversations unfold. Now available in the API alongside streaming models GPT-Realtime-Translate and GPT-Realtime-Whisper — a new set of audio capabilities for the next generation of voice interfaces.
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Max Stoiber retweeted
Composition is all you need. Watch the full video below.
In 30 minutes, I’m giving the first talk at React Universe: Composition is all you need Link below.
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Max Stoiber retweeted
Apr 30
It's never been easier to do everyday work with Codex. Choose your role, connect the apps you use every day, and try suggested prompts. Codex helps with everything from research and planning to docs, slides, spreadsheets, and more.
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Max Stoiber retweeted
with the keyboard master @mxstbr
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Max Stoiber retweeted
Apr 29
We've shipped more than a thousand versions of Zed, but all of them began with zero. Today, that changes. zed.dev/blog/zed-1-0
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Max Stoiber retweeted
On Notion's knowledge work benchmark, GPT 5.5 is 33% faster, uses half the tokens (so half the price), and scores slightly higher than Opus 4.7. @OpenAI has declared themselves the winners, this week, in the frontier knowledge work arena.
We’ve often been asked about how we eval each new model at Notion, since we’re one of the few apps deploying both frontier lab models and leading open source models for general knowledge work. Read on for what we share with the model providers after we evaluate their models.
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Remember when it was novel for an LLM to think for a few seconds?
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Replying to @rao2z
@OpenAI's o1 thinks for seconds, but we aim for future versions to think for hours, days, even weeks. Inference costs will be higher, but what cost would you pay for a new cancer drug? For breakthrough batteries? For a proof of the Riemann Hypothesis? AI can be more than chatbots
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Max Stoiber retweeted
Apr 23
Stop tweeting for a hot minute and update your Codex App to find full browser use, global dictation, non-dev mode, a new auto-review mode that is much safer than yolo, in-app docs and PDF viewer, and ... GPT-5.5.
With GPT-5.5, Codex now gets more of the job done across the browser, files, docs, and your computer. We've expanded browser use so Codex can interact with web apps, and test flows, click through pages, capture screenshots, and iterate on what it sees until it completes the task.
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Max Stoiber retweeted
Apr 21
Exciting news - GPT-Image-2 by @OpenAI has claimed the #1 spot across all Image Arena leaderboards! A clean sweep with a record-breaking 242 point lead in Text-to-Image - the largest gap we’ve seen to date. - #1 Text-to-Image (1512), 242 over #2 (Nano-banana-2 with web-search aka gemini-3.1-flash-image) - #1 Single-Image Edit (1513), 125 over #2 (Nano-banana-pro aka gemini-3-pro-image) - #1 Multi-Image Edit (1464), 90 over #2 (Nano-banana-2) No model has dominated Image Arena with margins this wide. Huge congratulations to @OpenAI on this major breakthrough in image generation! More performance breakdowns by category in the thread below.
Apr 21
Made with ChatGPT Images 2.0
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