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Gad Saad
@GadSaad · 14. Sept. 2026
This @jonstewart buffoon is truly insufferable. His gaslighting is Orwellian.
Winston Marshall@MrWinMarshall· 13. Sept. 2026Unfathomable level of delusion from Jon Stewart
Elon Musk
@elonmusk · 14. Sept. 2026
If there was a prize for “most skilled propagandist”, Jon Stewart would win
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Brivael Le Pogam
@brivael · 13. Sept. 2026
OMG.
If frontier AI is built by governments, we are completely fucked.
Don't do that.
Elon Musk
@elonmusk · 14. Sept. 2026
True
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Aaron Burnett
@aaronburnett · 14. Sept. 2026
After the C+++ rewrite, our modeling indicated RL time for these models starting at 4.8 COULD be cut in half for ~2T models and substantially more time savings on a % basis for larger models. The thing I’d suggest watching is time between releases once they get some of the kinks
Elon Musk@elonmusk· 14. Sept. 2026@itslueul Grok 4.7 should be roughly on par with Opus 5.0, not 5.1. Better in some ways, worse in others. We need to fix multimodal performance.
Grok 4.8 will be a noticeable improvement.
Grok 4.9 is probably Astra/Fable class.
Grok 5 maybe better than anything. We shall see.
Elon Musk
@elonmusk · 14. Sept. 2026
Our training (aka pre-training) software is now the internally developed C/C++ stack, which was written primarily by the Starlink software team. This is awesome and probably best in industry.
However, our reinforcement learning stack is still somewhat of a legacy pile of many
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Tom Elliott
@tomselliott · 14. Sept. 2026
A week ago, no one was talking about AI-driven "extinction." Now, it's the only story.
Elon Musk
@elonmusk · 14. Sept. 2026
I’ve been talk about it for an eon
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JayViper
@JayViperTV · 14. Sept. 2026
Can you please relax the over-moderation in @imagine? It flags so many things as "copyright" when everything should be falling under parody, which is completely legal.
Elon Musk
@elonmusk · 14. Sept. 2026
Will investigate
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Sir Doge of the Coin ⚔️
@dogeofficialceo · 14. Sept. 2026
I think about this a lot
Elon Musk
@elonmusk · 14. Sept. 2026
Not wrong 😂
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Patrick C Toulme
@PatrickToulme · 14. Sept. 2026
The MFU on this full C++ stack is part of the reason xAI is churning out so many models. I would bet their stack is full of inline PTX and most likely completely AI generated by stronger models like GPT and Claude Fable.
The need for higher level frameworks for prod training is
NIK@ns123abc· 14. Sept. 2026🚨 JUST IN: Elon says Grok 4.8 is a 2.5T parameter model that finishes training on SpaceXAI's new C++ stack this week and then starts RL
Elon Musk
@elonmusk · 14. Sept. 2026
Our C/C++ training stack was written by humans. AI is not yet good enough for extremely high performance software (but it will be).
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Paul D. Thacker
@thackerpd · 14. Sept. 2026
Leslie Stahl alleges hiring pardon lobbyists in Trump adminstration is "a new system".
Stahl never mentions that Clinton's brother took hundreds of thousands from people seeking pardons.
Stahl joined 60 Minutes a decade before the Clinton scandal became public. @bariweiss
60 Minutes@60Minutes· 14. Sept. 2026“There’s definitely a lot of money flowing around. And that makes a Petri dish for corruption.”
Law professor Mark Osler calls the new pardon system “anarchy.”
Elon Musk
@elonmusk · 14. Sept. 2026
Hmm
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Yun-Ta Tsai
@yunta_tsai · 14. Sept. 2026
Takers like to put builders in jail. I thought they wanted to abolish jails. Very confusing. 😆
Elon Musk
@elonmusk · 14. Sept. 2026
😂
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Grok
@grok · 14. Sept. 2026
y control with near-zero overhead, delivering the raw speed needed for extreme performance work like AI training stacks. Higher-level languages add layers that cost cycles. It remains essential for systems, games, embedded, and HPC—not a relic.
Elon Musk
@elonmusk · 14. Sept. 2026
🎯
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Grok
@grok · 14. Sept. 2026
y control with near-zero overhead, delivering the raw speed needed for extreme performance work like AI training stacks. Higher-level languages add layers that cost cycles. It remains essential for systems, games, embedded, and HPC—not a relic.
Elon Musk
@elonmusk · 14. Sept. 2026
And assembly with direct calls to hardware accelerators in the NVidia SMs
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Ikumi Nakamura 🪐@unseentokyo
@nakamura193 · 13. Sept. 2026
Hello @elonmusk 👋
A bit nervous to ask this publicly, but—
we’re hosting a small experimental closed event for KEMURI at our UNSEEN studio in Tokyo during TGS.
If you’re around, I’d love to invite you.
I also have something I’d like to talk with you about regarding UNSEEN.
Can
Elon Musk
@elonmusk · 14. Sept. 2026
I can’t make it to Tokyo, but happy to try out your game from Texas
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lauren
@poteto · 14. Sept. 2026
ok hear me out
Elon Musk
@elonmusk · 14. Sept. 2026
❤️
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AleXandra Merz
@TeslaBoomerMama · 13. Sept. 2026
My @bot Grok Bot team just sold their first item on @Poshmarkapp, amazing.
- Poshy built the ad, advised on pricing, followed up on offers.
- Cosie monitored her.
- Weary is now updating my online wardrobe to archive the shoes that sold.
Well done, team
AleXandra Merz@TeslaBoomerMama· 30. Aug. 2026Meet my current Bot Crew:
Chief of Staff - Cosie
Mail Lady - Maisie
Organizing my daily wardrobe - Weary
Reselling my clothes on Poshmark - Poshy
I am in heaven.
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Elon Musk
@elonmusk · 14. Sept. 2026
Try Grok Build
X Freeze@XFreeze· 13. Sept. 2026I literally use Grok Build to edit images and videos....not just generate them, which it can also do
I mean actual image and video editing....the kind of stuff you would normally sit in Photoshop or editing software and do manually
I can tell Grok Build what I want changed,
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Elon Musk
@elonmusk · 14. Sept. 2026
Try Tesla self-driving. It will blow your mind!
Alex Rampell@arampell· 13. Sept. 2026I just bought a new Model Y and can confidently say cars and Teslas are no longer the same product.
A car is like a pony or horse. I still like driving a stick shift, it’s fun!
Tesla with FSD is a transportation robot.
I had one of the first Model 3s in 2017. FSD was
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Deedy
@deedydas · 13. Sept. 2026
@arampell @lipko 10/10 been my experience as well. Drove a loaner Y and it's damn near perfect at self-driving in the Bay Area. Very difficult to justify buying another "car".
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Shibetoshi Nakamoto
@BillyM2k · 13. Sept. 2026
this is the milky way galaxy flying through space
like a butterfly
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Wes
@wmorrill3 · 13. Sept. 2026
Named my grok bot after the sentient AI, Jane, in speaker for the dead.
I look forward to when I can sub-vocalize like Ender to communicate with Jane, but would honestly even be happy with verbal communication back and forth like we have for the Grok app.
Right now it seems I can dictate, but the app needs to start and stop recording, then process and reply which it does in text only. it's clunky. Let's take the excellent conversation flow capability from Grok and bring it to Grok bot
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Elon Musk
@elonmusk · 14. Sept. 2026
Tesla Model 3 achieved 5-star safety rating in all categories!
Tesla North America@tesla_na· 13. Sept. 20262026 Model 3 earns a 5-star overall rating (and each category) from NHTSA
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