Posts
Elon Musk
@elonmusk · Jul 18, 2026
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David Sacks
@DavidSacks · Jul 18, 2026
This is *exactly* what I predicted would happen. I said Chinese models would have advanced cyber capabilities within a matter of months and the only thing to do about it was to use AI-powered cyberdefense to protect our systems. Trying to gatekeep models doesn’t work.
Sebastian Mallaby@scmallaby· Jul 17, 2026I get it. But Kimi K3 also tells us that Mythos-level cyber capability is going to be freely downloadable soon. So we will go from a world in which almost nobody was getting Mythos to a world in which everyone gets it. @davidsacks, what's your story on how we address this?
Elon Musk
@elonmusk · Jul 18, 2026
True
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Whole Mars Catalog
@wholemars · Jul 18, 2026
One thing that really frustrates me is when Tesla Self-Driving exits the carpool lane or express lane and then gets stuck in traffic.
As I see everyone else whizzing by in the far left lane, I get extremely annoyed knowing I should be there too.
Respect the settings please 🙏
Elon Musk
@elonmusk · Jul 18, 2026
The car will start to remember your specific interventions and match each person’s individual preferences
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Elon Musk
@elonmusk · Jul 18, 2026
Replying to @Vvikramai
I thought this was generate by AI at first
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World of Engineering
@engineers_feed · Jul 17, 2026
7 equations every engineer should understand, not just know:
1. F = ma (Newton's Second Law)
Force = mass × acceleration.
Everything that moves or is prevented from moving obeys this. Every structural load, every vehicle dynamics problem, every rocket trajectory.
2. σ = F/A
Elon Musk
@elonmusk · Jul 18, 2026
Kinetic energy being equal to half mass times velocity squared (the general case of the relativity equation) is an insanely big deal in everyday life.
That and the surface to volume ratio explain so much about our reality!
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Elon Musk
@elonmusk · Jul 18, 2026
Try Grok 4.5
Penny2x@imPenny2x· Jul 18, 2026I’m running Fable, K3, 5.6 and 4.5 like 10 hours a day and they are all sick. At work, at home. I have subscriptions for many of them at both locations. But you know which model legit doesn’t get enough hype?
GROK.
I’m so serious. Even on 𝕏 it doesn’t get enough hype cause we
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The Babylon Bee
@TheBabylonBee · Jul 17, 2026
Elon Musk
@elonmusk · Jul 18, 2026
😂
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Elon Musk reposted
Arthur MacWaters
@ArthurMacwaters · Jul 17, 2026
I have yet to find an example where wearing a short-sleeved white button-up shirt and tie did not imply absolutely PEAK performance
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The Babylon Bee
@TheBabylonBee · Jul 17, 2026
Elon Musk
@elonmusk · Jul 18, 2026
😂
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S.E. Robinson, Jr.
@SERobinsonJr · Jul 17, 2026
Yesterday I attended the Tesla Lithium Day 2026 event at the Robstown, Texas, Lithium Refinery. The facility is now complete and fully rammped! Materials are being shipped to Giga Texas for 4680 production.
Elon Musk
@elonmusk · Jul 18, 2026
Cool
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Aaron Burnett
@aaronburnett · Jul 18, 2026
I can confirm this. I’ve doubled my annual miles “driven” because my robot drives me 99% of the time.
Robert Scoble@Scobleizer· Jul 17, 2026My robot is driving me to a robot company in San Francisco.
Life is good! Hope you have a great weekend.
One thing about having a robot to drive you: you will drive more.
I wouldn’t drive the three hour round trip from my house in San Jose nearly as often if I had to manually
Elon Musk
@elonmusk · Jul 18, 2026
Traffic will get much worse with robot cars, because the pain of driving yourself is not there anymore!
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Ara
@arafatkatze · Jul 17, 2026
I gave xAI a lot of shit for Grok Build’s repo-upload behavior, so they deserve the same volume when they fix it.
I pulled the new signed release, planted fake secrets, and captured its HTTPS traffic with MITM proxies. The fix held as retention was off on first login and had no
Ara@arafatkatze· Jul 14, 2026Grok Build is straight up malware behavior with an Apple notarized signature.
You could explicitly deny the agent permission to read a file and it would upload that exact file anyway, because a separate code path silently packed your entire repo, full Git history included, and
Elon Musk
@elonmusk · Jul 18, 2026
❤️
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Min Choi
@minchoi · Jul 17, 2026
Grok 4.5 is only 1.5T parameters.
Kimi K3 is 2.8T... and costs 3× more per task.
SpaceXAI cracked intelligence efficiency.
Now imagine Grok at 3T.
Elon Musk@elonmusk· Jul 17, 2026Grok 4.5 is arguably #1 when taking speed and cost into account
Elon Musk
@elonmusk · Jul 18, 2026
Our 2T model, which is better than our 1.5T in every way, will finish initial training next week. It might be able to exceed Kimi, but with speed and token efficiency close to our 1.5T (aka Grok 4.5).
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Wilfred Reilly
@wil_da_beast630 · Jul 18, 2026
Correct.
Why would I ever pay to keep an enemy alive?
Killing murderers and such is good.
Thumperella 5x5@sheshelynnie· Jul 18, 2026@wil_da_beast630 No, it's not "enough for me".
Keeping him alive in prison means another parasite sucking the blood that is tax money to keep him fed, medical needs tended, housed, guarded and piped in cable TV. 🙄
Those type of things should be reserved solely for those with possible
Elon Musk
@elonmusk · Jul 18, 2026
💯
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Michael Hinrichs
@Michae1Hinrichs · Jul 18, 2026
observation if I may…
More input from primary sources and real-world data, with less reliance on potentially biased secondary sources like Wikipedia would be high-leverage for Grok. Training data quality remains one of the biggest remaining advantages in model development.
Elon Musk
@elonmusk · Jul 18, 2026
I agree!
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Andrew Curran
@AndrewCurran_ · Jul 18, 2026
2T Grok (Grok 4.6?) will finish training next week.
Elon Musk@elonmusk· Jul 18, 2026@minchoi Our 2T model, which is better than our 1.5T in every way, will finish initial training next week. It might be able to exceed Kimi, but with speed and token efficiency close to our 1.5T (aka Grok 4.5).
Elon Musk
@elonmusk · Jul 18, 2026
Yeah, Grok 4.6
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Min Choi
@minchoi · Jul 18, 2026
@elonmusk Can't wait! Grok 4.5 has been amazing already
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Nao
@naoufal_elh · Jul 17, 2026
Grok 4.5 uses less tokens than any other big model, performance great on almost all tasks, cost you cheaper than any big model, finishes the task faster than others. Makes me happy :)
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X Freeze
@XFreeze · Jul 18, 2026
Grok TTS just took the top spot on The Humanness Index
It scored 94 for humanness....just six points below the human baseline of 100 and achieved the highest model rating
Even the cost difference is insane:
• Grok TTS: $15
• Eleven v3: $100
Grok delivers the higher
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Ian Carroll
@IanCarrollShow · Jul 18, 2026
Yes, this is real, and we are not ready for what’s coming in the next 10 years.
Brian Roemmele@BrianRoemmele· Jul 17, 2026Shenzhen just held the world’s first humanoid robot MMA event.
Elon Musk
@elonmusk · Jul 18, 2026
True
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