Posts
Austin Vernon
@Vernon3Austin · Sep 17, 2025
Boring Company is dangerously close to being able to provide every city dozens of miles of light rail/BRT type capacity with no public money, limited utilities interruption, and minimal new right-of-way. While offering passenger travel times that are a fraction of other transit.
The Boring Company@boringcompany· Sep 13, 2025Prufrock-1 has emerged!
This completes a 2.26 mile long Vegas Loop tunnel, connecting a property close to the Airport in the south to the Westgate Resort in the north. Along the way, there will be 8 new stations, including the Virgin Hotels and the Hughes Center.
Elon Musk
@elonmusk · Sep 17, 2025
I love trains, but the future is individualized mass transit with autonomous electric vehicles taking you precisely to your destination.
Tunnels are needed to address the fundamental choke points in cities. You can’t have 3D buildings and expect a 2D transport system to be effective! Multiple layers of tunnels enable transport to be 3D too.
The fastest way to travel long distances city center to city center, short of new physics, is cars/pods in vacuum tunnels.
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Elon Musk
@elonmusk · Sep 17, 2025
Better to live life erring on the side of being optimistic and wrong than pessimistic and right!
Be realistic, but, as Monty Python would say, always look on the bright side of life!
Peter H. Diamandis, MD@PeterDiamandis· Sep 17, 2025The only time more exciting to be alive than today is tomorrow.
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Tech Dev Notes
@techdevnotes · Sep 17, 2025
Elon is hyping up Grok 5
Elon Musk
@elonmusk · Sep 17, 2025
Just a chance.
But I thought the probability was 0% for all prior Grok releases and now my neural net predicts ~10% probability and rising for Grok 5.
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@missmayn · Sep 17, 2025
this stat made me laugh so hard:
the median age for CNN's audience is currently 67 years old, making it the youngest among the major cable news networks.
Elon Musk
@elonmusk · Sep 17, 2025
😂
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Elon Musk
@elonmusk · Sep 17, 2025
Extremely troubling
Eric Schmitt@Eric_Schmitt· Sep 17, 2025For those who don’t understand the problem
ABC News: 87% of Democrats view Trump as a fascist
NPR: 47% of Democrats say the “rise of fascism” is their top political concern
Rutgers: 55% of Americans on the Left believe assassinating Trump would be “at least somewhat justified”
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Elon Musk
@elonmusk · Sep 17, 2025
Wood-fired pizza oven coming to @xAI
Eric Jiang@veggie_eric· Sep 17, 2025why is pizza in the Bay Area such absolute trash
like wtf, we nerds can cook up a recipe for a gajillion-parameter model no problemo but can't figure out a mildly appetizing ratio for some flour, water, and cheese
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Elon Musk
@elonmusk · Sep 17, 2025
Great work by the Tesla futuristic diner team!
Tesla North America@tesla_na· Sep 16, 2025Tesla Diner is tasty, locally sourced food + good vibes + entertainment
All while Supercharging
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Tech Dev Notes
@techdevnotes · Sep 17, 2025
Grok 4 is nice but Annoyingly Slow
Grok 4 Fast is much better experience
Hope Grok 4.1 is not Slow
Elon Musk
@elonmusk · Sep 17, 2025
4.1 is much faster
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Jarvis
@jarvis_best · Sep 17, 2025
Just remembered the author of this book doesn't permit replies to his tweets hahahaha
Elon Musk
@elonmusk · Sep 17, 2025
😂
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Elon Musk
@elonmusk · Sep 17, 2025
Colossus II, the world’s first Gigawatt AI training cluster
X Freeze@XFreeze· Sep 16, 2025xAI’s Colossus 2: The World’s First Gigawatt-Scale Datacenter
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heiner
@HeinrichKuttler · Sep 17, 2025
come to the winning side
SemiAnalysis@SemiAnalysis_· Sep 16, 2025xAI’s Colossus 2 – First Gigawatt Datacenter In The World
Unique RL Methodology
On Site Turbines + Mississippi Expansion with Solaris Energy
Can xAI afford it?
Middle East Funding, Tesla
Talent Exodus, API revenue, Consumer Growth
RL Environment
Elon Musk
@elonmusk · Sep 17, 2025
🚀
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Elon Musk
@elonmusk · Sep 17, 2025
xAI knows how to party
Brent Mayo@BrentM_BuildGuy· Sep 17, 2025🧑🍳
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Elon Musk
@elonmusk · Sep 17, 2025
True
tetsuo@tetsuoai· Sep 17, 2025Grok 4 Heavy is ridiculously good at finding bugs. 💫
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Brent Mayo
@BrentM_BuildGuy · Sep 16, 2025
True 😂
Elon Musk@elonmusk· Sep 16, 2025@yeonwoo1102 @BIMBOSATTVA_ We are literally painting MACROHARD on the roof of the Colossus II supercompute cluster in Memphis big enough so you can read it from space
Elon Musk
@elonmusk · Sep 17, 2025
We will post drone shots when it’s done 😂
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Elon Musk
@elonmusk · Sep 17, 2025
This is a major initiative
Aditya Paliwal@VastoLorde95· Sep 16, 2025What if we could supercharge the X Algorithm with the full might of xAI's compute, and the Grok pretraining stack?
We're looking for extremely strong engineers to help us tear down, rebuild, and scale the most important app on the planet.
Please apply in the link, comment below
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Haider.
@haider1 · Sep 17, 2025
An important DeepMind report on: what AI will look like in 2030
key summary points:
- scaling continues through 2030, but needs huge spending and infrastructure
- frontier models in 2030 may cost $100B+ to train
- frontier training runs will require gigawatts of electrical
Elon Musk
@elonmusk · Sep 17, 2025
Obviously
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Elon Musk
@elonmusk · Sep 17, 2025
Try it out!
Tesla Australia & New Zealand@TeslaAUNZ· Sep 17, 2025FSD Supervised is now available in Australia and New Zealand
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Elon Musk
@elonmusk · Sep 17, 2025
Precisely
J.K. Rowling@jk_rowling· Sep 17, 2025Words are not violence. When you pretend that views that oppose your own are violence, you are justifying the use of actual violence towards the speaker.
Gender ideology’s reliance on tropes and slogans like ‘words are violence’, its constant rationalisation and justification of
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Sawyer Merritt
@SawyerMerritt · Sep 16, 2025
Tesla China posted on Weibo a fan made video of the Roadster. It's very well done.
Elon Musk
@elonmusk · Sep 17, 2025
The new Roadster is something special beyond a car
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Yu Lin
@basicprompts · Sep 17, 2025
Still one of the most insane lines I've read in any ML paper.
Elon Musk
@elonmusk · Sep 17, 2025
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