Jeff Dean
@jeffdean.bsky.social
Google Chief Scientist, Gemini Lead. Opinions stated here are my own, not those of Google. Gemini, TensorFlow, MapReduce, Bigtable, Spanner, ML things, ...
Reposted by Jeff Dean
The multimodal reasoning is very cool. Something I’ve been tracking with models for a while and Gemini 3 Pro was the first to produce a plausible response.
I’ve had a running test for multimodal models over the last ~year: extract the “Crss” values for each tick mark in this chart. GPT 5 makes up numbers, Claude 4.5 refuses to try, Qwen3 VL has a plausible guess. Gemini 3 pro pretty much nails it.
November 19, 2025 at 3:09 AM
The multimodal reasoning is very cool. Something I’ve been tracking with models for a while and Gemini 3 Pro was the first to produce a plausible response.
I’m really excited about our release of Gemini 3 today, the result of hard work by many, many people in the Gemini team and all across Google! 🎊
blog.google/products/gem...
Gemini 3 performs quite well on a wide range of benchmarks.
blog.google/products/gem...
Gemini 3 performs quite well on a wide range of benchmarks.
November 19, 2025 at 2:53 AM
I’m really excited about our release of Gemini 3 today, the result of hard work by many, many people in the Gemini team and all across Google! 🎊
blog.google/products/gem...
Gemini 3 performs quite well on a wide range of benchmarks.
blog.google/products/gem...
Gemini 3 performs quite well on a wide range of benchmarks.
Reposted by Jeff Dean
Trump should release all of the Epstein files: every person and every document in the files.
November 15, 2025 at 12:18 AM
Trump should release all of the Epstein files: every person and every document in the files.
DataRater can continuously+adaptively learn which examples will improve an ML model the most during training.
Delighted to have worked on this with @luisazintgraf.bsky.social, @dancalian.bsky.social, @gregfar.bsky.social, Iurii Kemaev, et al. (see full list at the of Luisa's thread).
Delighted to have worked on this with @luisazintgraf.bsky.social, @dancalian.bsky.social, @gregfar.bsky.social, Iurii Kemaev, et al. (see full list at the of Luisa's thread).
Excited to share our new paper, "DataRater: Meta-Learned Dataset Curation"!
We explore a fundamental question: How can we *automatically* learn which data is most valuable for training foundation models?
Paper: arxiv.org/pdf/2505.17895 to appear at @neuripsconf.bsky.social
Thread 👇
We explore a fundamental question: How can we *automatically* learn which data is most valuable for training foundation models?
Paper: arxiv.org/pdf/2505.17895 to appear at @neuripsconf.bsky.social
Thread 👇
November 6, 2025 at 3:43 PM
DataRater can continuously+adaptively learn which examples will improve an ML model the most during training.
Delighted to have worked on this with @luisazintgraf.bsky.social, @dancalian.bsky.social, @gregfar.bsky.social, Iurii Kemaev, et al. (see full list at the of Luisa's thread).
Delighted to have worked on this with @luisazintgraf.bsky.social, @dancalian.bsky.social, @gregfar.bsky.social, Iurii Kemaev, et al. (see full list at the of Luisa's thread).
Honored to be named in TimeAI 100 list, along w/my awesome Google colleagues Josh Woodward & Hartmut Neven & many awesome people.
My recognition is due to collaboration with many great colleagues, so thank you to everyone I've been fortunate to work with over many years! 🙏
time.com/collections/...
My recognition is due to collaboration with many great colleagues, so thank you to everyone I've been fortunate to work with over many years! 🙏
time.com/collections/...
time.com
August 29, 2025 at 1:14 AM
Honored to be named in TimeAI 100 list, along w/my awesome Google colleagues Josh Woodward & Hartmut Neven & many awesome people.
My recognition is due to collaboration with many great colleagues, so thank you to everyone I've been fortunate to work with over many years! 🙏
time.com/collections/...
My recognition is due to collaboration with many great colleagues, so thank you to everyone I've been fortunate to work with over many years! 🙏
time.com/collections/...
Our latest Gemini image generation and editing model is quite good. It lets you indulge in a bit of creative fun, helps you make new business cards, etc!
Try it out at gemini.google.com
Blog: blog.google/products/gem...
Try it out at gemini.google.com
Blog: blog.google/products/gem...
August 27, 2025 at 1:10 AM
Our latest Gemini image generation and editing model is quite good. It lets you indulge in a bit of creative fun, helps you make new business cards, etc!
Try it out at gemini.google.com
Blog: blog.google/products/gem...
Try it out at gemini.google.com
Blog: blog.google/products/gem...
AI efficiency is important. The median Gemini Apps text prompt in May 2025 used 0.24 Wh of energy (<9 seconds of TV watching) & 0.26 mL (~5 drops) of water. Over 12 months, we reduced the energy footprint of a median text prompt 33x, while improving quality:
cloud.google.com/blog/product...
cloud.google.com/blog/product...
August 21, 2025 at 1:39 PM
AI efficiency is important. The median Gemini Apps text prompt in May 2025 used 0.24 Wh of energy (<9 seconds of TV watching) & 0.26 mL (~5 drops) of water. Over 12 months, we reduced the energy footprint of a median text prompt 33x, while improving quality:
cloud.google.com/blog/product...
cloud.google.com/blog/product...
Reposted by 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
That’s going to take more investment from the City, State, & County. Great research from @urbaninstitute.bsky.social & @yonahfreemark.com
July 8, 2025 at 3:10 AM
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
That’s going to take more investment from the City, State, & County. Great research from @urbaninstitute.bsky.social & @yonahfreemark.com
Reposted by Jeff Dean
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 ).
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 ).
Google and CFS Announce Strategic 200 MW Fusion Power Deal
YouTube video by Commonwealth Fusion Systems
www.youtube.com
June 30, 2025 at 1:30 PM
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 ).
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! 🎉
June 28, 2025 at 5:33 AM
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! 🎉
Reposted by Jeff Dean
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
June 27, 2025 at 4:50 AM
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
Reposted by Jeff Dean
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
‘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.
www.wsj.com
June 13, 2025 at 3:26 PM
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
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)
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)
June 10, 2025 at 3:35 PM
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)
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)
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...
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...
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.
blog.google
May 6, 2025 at 3:08 PM
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...
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...
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/...
www.demarcken.org/carl/papers/...
www.demarcken.org
April 23, 2025 at 9:51 AM
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/...
www.demarcken.org/carl/papers/...
Reposted by Jeff Dean
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.
April 22, 2025 at 2:41 PM
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.
April 20, 2025 at 10:35 PM
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.
🥁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. 🥇
Now integrating thinking capabilities, 2.5 Pro Experimental is our most performant Gemini model yet. It’s #1 on the LM Arena leaderboard. 🥇
March 25, 2025 at 5:25 PM
🥁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. 🥇
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...
Neural Networks" paper open source, in partnership with the Computer History Museum.
computerhistory.org/press-releas...
March 20, 2025 at 9:02 PM
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...
Neural Networks" paper open source, in partnership with the Computer History Museum.
computerhistory.org/press-releas...
Reposted by Jeff Dean
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.
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.
www.nytimes.com
March 18, 2025 at 2:53 AM
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.
Reposted by Jeff Dean
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
Follow live at khipu.ai/live
@morlaicassiopea.bsky.social , @nandodf.bsky.social, @jeffdean.bsky.social , #GuillermoSapiro, #NayatSanchezPi
March 13, 2025 at 3:34 PM
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
Follow live at khipu.ai/live
@morlaicassiopea.bsky.social , @nandodf.bsky.social, @jeffdean.bsky.social , #GuillermoSapiro, #NayatSanchezPi
Introducing our Gemma 3 open models, the most capable models that you can run on a single GPU or TPU. Multimodal, multilingual, 128k context length, and exceeds quality of other open models that are an order of magnitude larger in terms of hardware footprint. 🎉
blog.google/technology/d...
blog.google/technology/d...
Introducing Gemma 3: The most capable model you can run on a single GPU or TPU
Today, we're introducing Gemma 3, our most capable, portable and responsible open model yet.
blog.google
March 13, 2025 at 2:55 PM
Introducing our Gemma 3 open models, the most capable models that you can run on a single GPU or TPU. Multimodal, multilingual, 128k context length, and exceeds quality of other open models that are an order of magnitude larger in terms of hardware footprint. 🎉
blog.google/technology/d...
blog.google/technology/d...
Exciting news: @waymo.bsky.social is beginning public service on the Peninsula, starting with Palo Alto, Mountain View, and Los Altos! Initial service area below.
March 12, 2025 at 1:21 AM
Exciting news: @waymo.bsky.social is beginning public service on the Peninsula, starting with Palo Alto, Mountain View, and Los Altos! Initial service area below.
Being able to procure parts for broken weather radar equipment seems important..
The Bay Area weather radar (KMUX) has been out of service for more than 24 hours now. An expensive broken part needs to be replaced and specially ordered, but that may not be possible due to ongoing freeze on government credit card spending, I’ve been told.
March 3, 2025 at 6:29 AM
Being able to procure parts for broken weather radar equipment seems important..
A comprehensive longitudinal analysis showing some quite large increases in various health complications down the road after a COVID hospitalization (about 30% higher all-cause mortality and 35% higher all-cause hospitalization vs. matched controls).
March 3, 2025 at 6:19 AM
A comprehensive longitudinal analysis showing some quite large increases in various health complications down the road after a COVID hospitalization (about 30% higher all-cause mortality and 35% higher all-cause hospitalization vs. matched controls).