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Jeff Dean

@JeffDean531k followers

Co-founder & CEO of Discovery Loop. Former Chief Scientist, Google. Helped build many Google products, TPUs, Gemini, TensorFlow, MapReduce, Bigtable, ...

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1Nov 12, '25Exciting expansion! @Waymo now serves the whole SF Bay Area Peninsula from SF to San Jose and is taking riders on freeways.64.9×7.2M11k632653
2Dec 6, '23I’m very excited to share our work on Gemini today! Gemini is a family of multimodal models that demonstrate really strong capabilities across the image, audio, video, and text dom35×3.9M13k2.3k3.4k
3Apr 19, '25If you want to know more about how Google Flights works, airline tickets, and why it is super complicated to deal with all the constraints and the combinatorial combinations, I hig16.1×1.8M10k73813k
4Feb 15, '24Gemini 1.5 Pro - A highly capable multimodal model with a 10M token context length Today we are releasing the first demonstrations of the capabilities of the Gemini 1.5 series, wit15.1×1.7M6k1.1k2.2k
5Dec 19, '24Introducing Gemini 2.0 Flash Thinking, an experimental model that explicitly shows its thoughts. Built on 2.0 Flash’s speed and performance, this model is trained to use thoughts t13.2×1.5M3.7k467869
6Feb 21, '24Introducing Gemma - a family of lightweight, state-of-the-art open models for their class, built from the same research & technology used to create the Gemini models. Blog post: Te11.6×1.3M4.2k7751.4k
7Jan 23, '20Google Dataset Search is now officially out of beta. "Dataset Search has indexed almost 25 million of these datasets, giving you a single place to search for datasets & find li9.5×06.6k2.4k929
8Dec 3, '18In April, '17, @jsomers of @NewYorker reached out & said he wanted to do a small profile of me & my longtime colleague Sanjay Ghemawat, watch us work for a few hours, maybe9.2×05.9k1.2k2.1k
9Dec 6, '24What a way to celebrate one year of incredible Gemini progress -- #1🥇across the board on overall ranking, as well as on hard prompts, coding, math, instruction following, and more7.0×784k1.6k307241
10Dec 20, '24After 25.3 million autonomous miles driven, @Waymo vehicles have an 88% reduction in property damage claims and a 92% reduction in bodily injury claims compared to human drivers pe6.8×755k4.6k615584
11Aug 21, '25AI efficiency is important. Today, Google is sharing a technical paper detailing our comprehensive methodology for measuring the environmental impact of Gemini inference. We estima6.7×746k3.9k7581.7k
12Mar 21, '24We're starting to roll out API support for Gemini 1.5 Pro for developers. We're excited to see what you build with the 1M token context window! We'll be onboarding people to the AP5.6×626k1.9k377635
13Nov 20, '23This is a small research community. To all my friends, former colleagues and those that I don't know at OpenAI, the last few days have been a rollercoaster for those of us watching5.0×561k2.2k12882
14Dec 9, '23Gemini is Latin for "twins". The Gemini effort came about because we had different teams working on language modeling, and we knew we wanted to start to work together. The twins ar5.0×560k1.4k129179
15Nov 7, '25An exciting new approach for doing continual learning, using nested optimization for enhancing long context processing.4.7×527k1.7k155725
16Feb 15, '25I can't believe they've just cancelled the Epidemic Intelligence Service program at CDC. My father was an EIS officer: @Farzad_MD's thread below gives you a sense of the kind of pe4.5×501k3.7k874579
17Mar 12, '25Exciting news: @Waymo is beginning public service on the Peninsula, starting with Palo Alto, Mountain View, and Los Altos! Initial service area below.4.5×500k1.8k8592
19Sep 26, '24Welcome, AlphaChip! Today, we are sharing some exciting updates on our work published in @Nature in 2021 on using reinforcement learning for ASIC chip floorplanning and layout. We’4.3×475k1.9k326616
20Apr 3, '25We're using a ReLU to set tariffs?4.0×441k5.4k428371
21Jan 21, '25We’ve been thrilled by the positive reception to Gemini 2.0 Flash Thinking we discussed in December. Today we’re sharing an experimental update (gemini-2.0-flash-thinking-exp-01-213.9×430k1.3k128248
22Sep 5, '23Happy 25th Birthday Google! 🎉 I have gotten incredible enjoyement from being along for the ride for 24+ of these years. When I joined, we were a handful of people wedged into a sm3.5×394k2.3k200189
23Oct 15, '20What an awesome animation..3.5×03.6k552210
24Sep 12, '24Check out NotebookLM! Create a notebook, upload one or more sources (e.g. PDFs of research papers, your favorite PhD thesis, a newspaper article, etc) then click on 'Generate' to c3.5×391k2k3631.1k
25Dec 4, '20I understand the concern over Timnit’s resignation from Google. She’s done a great deal to move the field forward with her research. I wanted to share the email I sent to Google Re3.2×01.9k185351
26Sep 15, '18A reminder that some people in our field are alienating our female colleagues by flirting in settings that are meant to be professional and by trying to turn what should be topic- 3.2×02.7k83827
27Jan 18, '23Excited to share the first of a series of @GoogleAI blog posts summarizing our research work from 2022. This covers language & multimodal models, computer vision, and generativ3.1×351k1.6k317449
28Aug 10, '2425 years ago today I officially started at a small search engine company, wedged into a tiny office space above what's now a T-Mobile store in downtown Palo Alto. Since then, I hav2.9×322k3.9k142264
29Oct 22, '25Another step along the path to practical quantum computers!2.9×321k2.3k140197
30Mar 22, '20Healthcare workers are true heroes.2.8×03k51219
32Jan 26, '24Bard, powered by the Gemini Pro-scale model, debuts at the #2 position on the independent lmsys leaderboard. 🔥 Give it a try at . Bard is much better & has many more capabilit2.8×310k1.3k173186
33Jun 13, '18We're continuing to expand our @GoogleAI teams around the world. We’ll be opening our first research center in Africa in #Ghana later this year! If you're a machine learning resear2.7×01.8k80136
34Dec 12, '23On behalf of our co-authors Tomáš Mikolov, @ilyasut and Kai Chen, @greg_corrado and I were delighted to accept the #NeurIPS2023 Test of Time Award for the "word2vec" paper (). Than2.7×297k1.3k113195
35Jul 25, '24AI System Achieves Silver Medal-level score in IMO The International Mathematical Olympiad (IMO) is the oldest, largest & most prestigious competition for young mathematicians. Eve2.6×289k1.6k314375
36Mar 1, '25I too have been told to learn to code.2.5×284k1.7k65146
37Apr 22, '25Someone just reminded me of this lecture I gave in 2009 that described the evolution of Google Search from 1999 to 2009. People who are interested in how our search systems work mi2.5×280k2.4k2562.8k
38Nov 7, '20I am very hopeful that we move the U.S. back to welcoming the best & brightest students from all around the world to our colleges and universities. For so many decades, this wa2.5×02.8k35819
39Apr 10, '20I'm very happy to see @Google & @Apple partnering on technology to help w/ COVID-19 contact tracing. Technology, coupled w/ strong consideration of privacy, will enable public 2.5×02.2k51846
40Jan 15, '19On behalf of the whole Google Research & @GoogleAI community, I was excited to put together a post describing some of the work that we collectively did in 2018. I hope you enjo2.5×01.9k583171
41Jan 11, '18On behalf of the Google Brain team, I wrote a summary of some of the things we did in 2017. This is part 1 of 2. I'm very proud of the whole team and what we accomplished in 2017!2.5×01.9k76515
42Mar 27, '19Congratulations to my colleague @geoffreyhinton, along w/ @ylecun, & Yoshua Bengio for receiving this year's @TheOfficialACM Turing Award (the highest honor in computer science2.4×02.4k49723
43Oct 20, '24Since I wrote this answer to a student, I thought I would share more broadly.2.4×265k2.8k247547
44Aug 19, '23Not that many systems handle 6B QPS. 😀 "Bigtable has been in continuous production use at Google for more than 15 years now, processing over 6 billion requests per second at peak 2.3×257k1.2k161267
45Mar 25, '25🥁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 o2.2×249k2.5k303354
46Feb 12, '25I'm delighted to have joined my good friend and colleague @NoamShazeer for a 2+hour conversation with @dwarkesh_sp about a wide range of topics (early Google, ML hardware, training2.1×232k2k2161.2k
47May 19, '20Currently, the OPT program enables talented graduate students to work in the US for a period after they graduate. Eliminating this program will cause graduate students, with newly 2.1×01.9k38692
48Sep 25, '25Now you can automate many kinds of browser activity using the new Chrome DevTools MCP. In the other retweets of the base post, many people are already thinking of lots of great use2.0×228k1.4k169812
49May 18, '22And in a nod to efficiency, it's balanced, too!2.0×02.4k21955
50Jul 7, '20AI is full of promise, with the potential to revolutionize so many different areas of modern society. In order to realize its true potential, our field needs to be welcoming to all2.0×01.7k391102
51Jun 25, '20This graph is pretty striking. I hadn't seen this data broken apart by Bay Area vs. rest of California for a while.1.9×01.7k41476
52Oct 20, '18At Google, we've been getting a better understanding of issues of bias & fairness in machine learning models as we've used ML throughout more of our products. We've also create1.9×01.6k47787
53Sep 18, '24Human language LLMs are so passe. Read about this work on a whale bioacoustics model that can identify eight distinct species, including multiple calls for some of these species (e1.9×211k1.5k189375
54Oct 8, '24Congratulations to my good friend & former Google colleague Geoff Hinton for winning this year's Nobel Prize in Physics (along w/John Hopfield)! 🎉 Geoff's impact on so many scient1.9×210k1.6k8863
55Oct 17, '23Wonderful to see my good friend & colleague @geoffreyhinton today at the retirement party we organized for him. He retired in May, but this was the first chance to have a prope1.9×210k1.2k4223
56Jan 12, '21On behalf of the entire Google Research & @GoogleAI communities, I'm excited to share an overview of some of our research in 2020. Thanks to everyone who helped make this work 1.9×01.4k291253
57Aug 18, '19Last week, many of my colleagues got together to throw a surprise party to celebrate my 20th anniversary of working @Google. I am delighted & incredibly fortunate to have worke1.9×02.4k899
58Jan 11, '22As in past years, I've spent part of the holiday break summarizing much of the work we've done in @GoogleResearch over the last year. On behalf of @Google's research community, I'm1.9×01.4k262334
59May 24, '22AI can unlock joint human/computer creativity! Imagen is one direction we are pursuing: "A high contrast portrait of a very happy fuzzy panda dressed as a chef in a high end kitche1.8×01.6k268177
60Oct 11, '24My @Google colleague and longtime @UCBerkeley faculty member David Patterson has a great essay out in this month's Communications of the ACM (@TheOfficialACM):🎉 "Life Lessons from1.8×200k1.7k3291.5k
61Dec 20, '24The Gemini cookbook is the top trending repository on GitHub. Examples, API documentation, and more!1.8×199k1.8k2901.1k
62Sep 6, '18I'm very excited to see the launch of Dataset Search, which can help researchers, scientists, and others around the world find open datasets! To get a feel for it, try it with thin1.7×01.4k48358
63Aug 26, '25Our latest Gemini image generation and editing model is quite good (see the examples in the thread below). It lets you indulge in a bit of creative fun, helps you make new business1.7×191k1.7k82182
64Nov 8, '19An update: @geoffreyhinton has been in contact with Canadian immigration officials. They told him that anyone who has been denied a visa to attend @NeurIPS can request their case t1.7×01.4k48422
65Feb 19, '18Some new work from the part of Google Brain that works on ml for healthcare: we have encouraging early signs that non-invasive retinal images contain subtle indicators of cardiovas1.7×01.4k4892
67Mar 30, '25Our best model*, Gemini 2.5 Pro, is now available for everyone in the Gemini app model drop down menu at . Give it a try with your most difficult questions! *For now! 😃1.6×178k1.4k108109
68Apr 14, '25Introducing TxGemma, a family of open models specifically tailored for health settings, building on top of Gemma and Gemini.1.6×178k1.6k204488
69Nov 6, '19The denial of visas for people to attend scientific conferences inhibits the free flow of ideas that is essential for scientific progress. I wish visas weren't such a hindrance, es1.6×01.4k36215
70Feb 8, '24Bard (the product) is now Gemini. Gemini Advanced is powered by the Gemini Ultra 1.0 model, our most advanced multimodal model. Congrats to everyone who worked on this effort, incl1.5×171k1.5k236116
73Jun 20, '25Index freshness is something I and many others at Google have worked on for many years.1.4×160k1.2k73218
74Mar 17, '19Some meetings can literally suck the oxygen right out of you.1.4×01.3k31237
75Mar 2, '18Today, the part of Google Brain that had been working on healthcare problems open sourced a set of protocol buffer definitions for the FHIR standard, which makes it much easier to 1.4×01.2k36832
76Jan 22, '19When I was finishing grad school, I was applying for both academic faculty positions and industrial research positions. Only got one academic interview (& offer), and not from 1.4×01.5k18923
77Jun 16, '20Reminds me of my time in grad school.1.3×01.7k9237
78Jul 7, '20This ICE action against students on F-1 visas is incredibly damaging in many ways. It hurts U.S. competitiveness, damages our world-class universities, and, if enacted, will disrup1.3×01.3k24413
79Dec 17, '24No half measures in Veo 2. It stands to reason and bears looking at.1.3×145k1.8k65165
80Apr 6, '19What a time to be alive: collecting whale mucus via UAV! No doubt the first stage in a complex pipeline for data analysis or machine learning. Anyone else have equally exotic data 1.3×01.3k27012
81Sep 19, '20A croppy demonstration of bias.1.3×01.1k28536
82Nov 14, '20The launch of @TensorFlow ~5 years ago this week was a pretty exciting milestone for a lot of us. We all gathered in a conference room early one morning to watch the original blog 1.3×01.4k12188
83Jun 22, '22"A photo of the back of a wombat wearing a backpack and holding a walking stick. It is next to a waterfall and is staring at a distant mountain." #parti1.2×01.1k15287
85Sep 7, '20School "buses" like this would be awesome! Health benefits, a bit of excess energy burned off before arriving at school, chance to all work together on getting to school, great for1.2×01.2k18033
86May 11, '19.@geoffreyhinton was in Mountain View this week, so we decided to hold a Turing award celebration for him at @GoogleAI. Deanna Chen obtained secret info from Mohammad Norouzi about1.2×01.4k10911
87Jan 16, '20I think I'd never really watched a pole vault in such slow motion from this angle. It truly is an incredibly complex motion!1.2×01.3k14441
88Oct 24, '25TPUs go brrr!1.2×128k2.5k113112
90May 27, '20This video is a good reminder of why low latency, on-device ML is an important piece for creating really nice, natural-feeling user interfaces.1.1×01.1k16755
91Oct 9, '24Congrats to my colleagues @demishassabis & John Jumper for winning the Nobel Prize in chemistry for their awesome AlphaFold work. AlphaFold has had a dramatic impact across many fi1.1×120k1.5k12657
92Nov 27, '20Happy Thanksgiving, everyone, and I hope everyone is staying healthy! When in doubt, you can't go wrong with a kale salad!1.0×01.4k138
93Dec 27, '18Very happy to see my colleague Geoffrey Hinton has been named a Companion of the Order of Canada. A well-deserved honor! Congrats, Geoff!1.0×01.2k1325
94Apr 11, '19What a great photo capturing that exhilirating moment when your hard work all comes together for the first time. Congrats to Katie Bouman and the whole team behind this work!1.0×01.2k1065
95Aug 10, '24I am deeply saddened by the passing of my dear colleague and friend @SusanWojcicki. She has had a profound influence on everyone at Google and impacted the lives of so many. My hea1.0×111k1.2k2741
97Aug 1, '24We have an experimental updated version of Gemini 1.5 Pro that is #1 on the @lmsysorg Chatbot Arena. This model is a significant improvement over earlier versions of Gemini 1.5 Pro1.0×107k77610874
98May 6, '25Today we’re sharing an early look at our latest Gemini update for I/O! Introducing the updated Gemini 2.5 Pro (I/O edition), which ranks #1 on WebDev Arena and surpasses our previo0.9×100k1.3k120165
100Jul 13, '20One great thing about the Palo Alto area is that there's enough open space to go out and relax a bit, away from people. Ahhh...0.8×01.1k2217

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