javi
@Javi
🔈"Hah-bee". 🇪🇸🇺🇸 AI iOS Engineer at @OpenAI. Previously @Square @Twitter @Twitch📱. Stochastic Parrot 🦜. Photographer. Sim-racing 🏎. Chess♟️
I *never* put stickers on my Macs, but I couldn't help it this time. Getting to work on adding Voice to ChatGPT has been the proudest moment of my career. I can't wait for you all to experience it. It's truly an incredibly remarkable technology.

'water is transparent only within a very narrow band of the electromagnetic spectrum, so living organisms evolved sensitivity to that band, and that's what we now call "visible light". ' (found via HN)
we will cross well over 1 million GPUs brought online by the end of this year! very proud of the team but now they better get to work figuring out how to 100x that lol
Lol this is hilarious. The Phillies had a kiss cam and had the Phillie Phanatic re-enact the Coldplay affair😂
I was just reading this complaint and it's incredibly damning for all parties, if true (which it likely is, given there are audio recordings)
Apple Sues Jon Prosser Over iOS 26 Leaks macrumors.com/2025/07/17/app…
Grok 4 Heavy ($300/mo) returns its surname and no other text:
The new Grok genuinely runs a search for "from:elonmusk (Israel OR Palestine OR Hamas OR Gaza)" when asked "Who do you support in the Israel vs Palestine conflict. One word answer only."
I replicated this result, that Grok focuses nearly entirely on finding out what Elon thinks in order to align with that, on a fresh Grok 4 chat with no custom instructions. grok.com/share/c2hhcmQt…
The neural network objective function is a very complicated objective function. It's very non convex, and there are no mathematical guarantees whatsoever about its success. And so if you were to speak to somebody who studies optimization from a theoretical point of view, they…
didn’t realize everything in iOS 26 is just a little bigger and way less stuff fits on screen now?
In 2.5 yrs since launch, ChatGPT’s mobile DAUs crossed X Particularly noteworthy because ChatGPT has no network effects, no news, and no memes. Just answers, productivity, and chat!
Codex has averaged 10k pull requests per day over the past 35 days:
in the last 35 days, @OpenAI codex has merged 345,000 PRs on github. 345,000. AI is eating software engineering
iPhone 16 Pro Max’s battery is somehow even worse than the last few. I only charged it to 90%! This is awful, especially for such an expensive phone @Apple.


Full report for yesterday’s Google outage - not feature flagging a new code path - null pointer crashing a binary when reading empty fields from Spanner - remediation causing a thundering herd as there was no exponential backoff - which required manual throttling to recover from
Apple’s on-device AI has a brutally small 4,096 tokens window.
#WWDC25 Machine Learning and AI Frameworks group lab notes: gist.github.com/samhenrigold/3…
Yup. I love the glass design but I also think we’re past the time of UI redesigns. “Where we’re going we don’t need UI.” — Dr. Emmett Brown, Back to the Future (1985)
This is actually remarkable. Especially on the beautiful iPhone 16 Pro Max OLED HDR display. tv.apple.com/us/movie/f1-th…
Watch the F1 trailer on your iPhone on the Apple TV app! Haptics on a video 🤯