Jeff Dean

The Seattle area runs 14% less bus service today than it did in 2019. The region grew by 3% in that time. We’ve got to get back to running more frequent transit.

That’s going to take more investment from the City, State, & County. Great research from @urbaninstitute.bsky.social & @yonahfreemark.com

YouTube video by Commonwealth Fusion Systems Google and CFS Announce Strategic 200 MW Fusion Power Deal

Commonwealth Fusion lands in the ballpark of $2B of new funding from Google, and a purchase agreement for 200MW from ARC (half of the total).

www.youtube.com/watch?v=NjKM...

(For those not following, the base plate in SPARC is installed, and they're nearing the start of magnet integration ).

Thanks for sharing your journey, @moji249.bsky.social! As I said on Twitter, it's really important for people to see that grad school has its ups and downs and that there are real times of struggle. Congratulations on the graduation! 🎉

Paris before-and-after street transformation

Car parking removed between 2003-2023 in Paris

PARIS: In the last 20 years, 44ha of Paris car parking has been transformed, making room for wider sidewalks, bikes & buses (15ha), bike racks, EV spots, accessible space, & 2.2K new patios/terraces for outdoor dining. 90% of Paris trips are via walking, biking & transit. V/@villedeparis.bsky.social

‘The Magic of Code’ Review: The Book of Binary To a programmer, code can seem a “domain of sorcery” in which strings of characters have power in the real world.

My latest @wsj.com review-delightful new book about the magic and wonder of computers (plus unusual awareness of the ineluctable messiness of biology). www.wsj.com/arts-culture... @dereklowe.bsky.social @nachristakis.bsky.social @scottgottliebmd.bsky.social @thgoetz.bsky.social @ihaque.bsky.social

..., long-distance shared-phrase-dictionary-based communication system ("we won", "send reinforcements", "retreat", ...) using fire and a water tank, first keyboard instrument, and first tic-tac-toe-like game.

Btw, most of the things I mentioned above were from ~third to second century BC. And I didn't even mention the flamethrowers, automated coin-operated vending machine, early cataracts operation tool, atmospheric-pressure-based recurring fountain,...

Plus early cryptography cipher machines, medical instruments, early musical instruments and more.

The guides were awesome and did live demonstrations.

Early water+whistle based timer (up to seven hours) to wake up slumbering philosophy students so they didn't oversleep.

(Someone on X suggested "NapReduce" as a good name 😂)

Early system that computed position of five planets, phase of moon, etc. thousands of years into future using intricate gears

Early long-distance communication system using 5 bits (fire high or low) to encode the 24 Greek letters, one character at a time.

If you're ever in Athens, I highly recommend the Museum of Ancient Greek Technology!

maps.app.goo.gl/sngwM98ueKkr...

Early humanoid robots to pour water+wine, demonstrations of heat+steam+water weight to "magically" open 500 kg temple doors, armor, ...
(cont)

🙏

Here's the WebDev leaderboard from web.lmarena.ai/leaderboard

Google AI Studio Google AI Studio is the fastest way to start building with Gemini, our next generation family of multimodal generative AI models.

Explore the capabilities of the updated Gemini 2.5 Pro, now in Preview in AI Studio and Vertex AI, and experimentally in the Gemini app. aistudio.google.com

We look forward to your feedback! 🙏

Here’s a glimpse of what it can do - check out this retro Windows 95-style web app the model can build from a simple prompt.

Build rich, interactive web apps with an updated Gemini 2.5 Pro Our updated version of Gemini 2.5 Pro has improved capabilities for coding.

Today we’re sharing an early look at our latest Gemini model update for I/O!

Introducing the updated Gemini 2.5 Pro (I/O edition), which ranks #1 on WebDev Arena and surpasses our previous 2.5 Pro model by +147 Elo points. 🏆

blog.google/products/gem...

ITA was acquired by Google and became one of the foundations of Google Flights.

Fun fact: they had one of the largest Lisp codebases in the world.

If you want to know more about how Google Flights works & the complexity of airline constraints & combinatorial combinations, I highly recommend this set of slides by Carl de Marcken (co-founder of ITA software, which underpins of Google Flights).

www.demarcken.org/carl/papers/...

Breaking news: I am now an "adult"

My wife was cleaning out some drawers and found some childhood art of now-adult @vdean.bsky.social of the two of us with my longtime colleague Sanjay.

Lots of red. I like that there's a lunch break, though.

We'd love to get your feedback and see what you build with it.

aistudio.google.com/app/prompts/...

Gemini 2.5: Our most intelligent AI model Gemini 2.5 is our most intelligent AI model, now with thinking.

You can access Gemini 2.5 Pro today for free in AI Studio. It's also available to Gemini Advanced users in @geminiapp.

Learn more: goo.gle/4c3NitO

I remember my excitement when I first learned about the Mandelbrot set as a kid, and I spent a while implementing a Mandelbrot set visualizer. Check out the code the Gemini 2.5 Pro model wrote given the prompt “p5js to explore a Mandelbrot set”, visualizing its intricate fractal patterns!

🥁Introducing Gemini 2.5, our most intelligent model with impressive capabilities in advanced reasoning and coding.

Now integrating thinking capabilities, 2.5 Pro Experimental is our most performant Gemini model yet. It’s #1 on the LM Arena leaderboard. 🥇

Want to check out the source for the "AlexNet" paper? Google has made the code from Krizhevsky, Sutskever and Hinton's seminal "ImageNet Classification with Deep Convolutional
Neural Networks" paper open source, in partnership with the Computer History Museum.

computerhistory.org/press-releas...

Elon Musk’s Starlink Expands Across White House Complex Trump administration officials said the company donated the internet service, saying the gift had been vetted by the lawyer overseeing ethics issues in the White House Counsel’s Office.

Hi, I'm the guy who used to oversee the federal government's agency IT telecommunications contracts. This is extremely bad. There is absolutely no need for this. Not only is it a huge security exposure, but the simplest explanation for this is that it is meant to be a security exposure.

It was great meeting you both!

We have an outstanding panel on "Research at Academy & Industry" today at 6pm at #KHIPU2025 !

Follow live at khipu.ai/live

@morlaicassiopea.bsky.social , @nandodf.bsky.social, @jeffdean.bsky.social , #GuillermoSapiro, #NayatSanchezPi