Jeff Dean (@JeffDean) / X

Jeff Dean

9,351 posts

Jeff Dean

@JeffDean

Chief Scientist, Google DeepMind & Google Research. Gemini Lead. Opinions stated here are my own, not those of Google. TensorFlow, MapReduce, Bigtable, ...

research.google/people/jeff

Joined September 2017

Pinned
Jeff Dean
@JeffDean
Dec 3, 2018
In 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, maybe dinner, etc. It came out today. I think it captures our working style really well.
The Friendship That Made Google Huge
From newyorker.com
Jeff Dean
@JeffDean
Dec 6, 2023
I’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 domains. Our most-capable model, Gemini Ultra, advances the state of the art in 30 of 32 benchmarks,
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Jeff Dean
@JeffDean
Nov 12, 2025
Exciting expansion! @Waymo now serves the whole SF Bay Area Peninsula from SF to San Jose and is taking riders on freeways. waymo.com/blog/2025/11/t…
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Jeff Dean
@JeffDean
Apr 19, 2025
If 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 highly recommend this set of slides by Carl de Marcken, one of the co-founders of ITA software, which
Jaana Dogan ヤナドガン
@rakyll
Apr 19, 2025
The most underrated Google product: Google Flights.
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Jeff Dean
@JeffDean
Jan 23, 2020
Google 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 links to where the data is." Nice work, Natasha Noy and everyone else involved!
Discovering millions of datasets on the web
From blog.google
Jeff Dean
@JeffDean
Feb 15, 2024
Gemini 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, with the Gemini 1.5 Pro model. One of the key differentiators of this model is its incredibly long
1.7M
Jeff Dean
@JeffDean
Apr 3, 2025
We're using a ReLU to set tariffs?
Zygi
@nonagonono
Apr 2, 2025
Replying to @orthonormalist
oops, fixed. Now we get that nice straight line
440K
Jeff Dean
@JeffDean
Jun 30, 2024
Replying to @Komaniecki_R
Not dead, just berried.
98K
Jeff Dean
@JeffDean
Dec 20, 2024
After 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 per mile driven. 🚖
Waymo
@Waymo
Dec 19, 2024
Our mission is to be the world's most trusted driver and a new study by @SwissRe validates the exceptional safety record of the Waymo Driver. Learn more: waymo.com/blog/2024/12/n…
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Jeff Dean
@JeffDean
Feb 21, 2024
Introducing 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: blog.google/technology/dev… Tech report: goo.gle/GemmaReport This thread explores some of the
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Jeff Dean
@JeffDean
Aug 21, 2025
AI efficiency is important. Today, Google is sharing a technical paper detailing our comprehensive methodology for measuring the environmental impact of Gemini inference. We estimate that the median Gemini Apps text prompt uses 0.24 watt-hours of energy (equivalent to watching an
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Jeff Dean
@JeffDean
Aug 10, 2024
25 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 have had the incredible pleasure of working with awesome colleagues on software used by billions of
312K
Jeff Dean
@JeffDean
Oct 15, 2020
What an awesome animation..
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Jeff Dean
@JeffDean
Dec 19, 2024
Introducing 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 to strengthen its reasoning. And we see promising results when we increase inference time
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