Noah MacCallum

Check this out! 5.4 has amazing design skills but you need to steer its taste a bit. I got to write a skill for it with the help of my colleagues @hellodzzy @kleneway and @TinnRobert ! developers.openai.com/blog/designing…

My for you feed is becoming unbearable, I come looking for substance, end up watching random viral nonsense, close, repeat. I need an agent to protect me

@rbranson 1000% I have this literally twice/day and never tire of it

openai cafe might have the best slice in sf

welp. i had one of those rare fall off your chair moments yesterday working with codex + our newest model gpt-5.3-codex. 20ish turns and 33,082 tokens later. here's the result: alistairtown.vercel.app 🤯 🧵

We love to see it

*codex is thinking* Thinks of new features and kicks off more codex sessions Okay I have 7 now all churning, that's enough Pinged by codex, intense focus for 90s, another prompt Back to twitter This is so ADD my brain is shot rn

@shyamalanadkat It was an absolute pleasure working together, thanks for the support and good times, wishing you the best with what’s next!

quick update: i decided to leave openai last week. i joined a bit before chatgpt and it’s been a wild ride. who gets to wake up every day and help contribute to safe, beneficial agi. openai is one of the most exceptional places in the world to work on ai. insane talent density, strong research foundations, and a mission that forces you to think bigger. thank you sam and brad for the amazing leadership - openai is truly nothing without its people. thank you to the awesome folks i got a chance to build multiple cracked teams with. and most importantly, several founders + startups i got a chance to spend a lot of time with. i’ll be taking some time to explore what’s next. back to building soon.

I, for one, am excited for a an abundance of highly personalized, fast, well-designed software. Even billionaires couldn’t have s-tier saas apps designed for their random whims

@gabor Can't wait until I get a call from realtime api asking for a clarification it's blocked on

@noahmacca I think about this often actually

It now feels wrong to not have some codex task happening anytime I step away from my computer, eat, sleep, etc., I'm limited by wall-clock time so can't let any go to waste

I don't even have power at my house

Codex-5.2-xhigh doing a very impressive refactor (80 minutes in) Atlas agent building my cycling workouts for next week Scavenger's Reign playing on the side, sipping a Sanzo The year of agents

@ivanfioravanti Thanks Ivan!

Great GPT-5.1-Codex-Max Prompting Guide!

@ivanfioravanti #recommended-starter-prompt" target="_blank" rel="nofollow noopener">cookbook.openai.com/examples/gpt-5… Check the section `# Frontend tasks`!

@noahmacca What is FE snippet? 👀

GPT-5.1-Codex-Max is our best agentic coding model, and is now available in our API. It's a great model, but it’s also easier than ever to integrate. I’ve spent the last two weeks experimenting with our top customers - here's how to get the most out of it 🧵

opus 4.5 failed to fix a really annoying bug it kept being confidently wrong about the source but gpt-5.1-codex-max-extra-high found it with ease openai is still the king

See how customers are using GPT-5.1-Codex-Max in the API for agentic coding ⬇️

@cursor_ai @realchillben 5/ You can find (a lot) more detail in our official prompt guide here: cookbook.openai.com/examples/gpt-5…

4/ Shoutout to this great resource from @cursor_ai on how they got the best performance from GPT-5.1-Codex-Max (h/t @realchillben ) cursor.com/blog/codex-mod…