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Elon Musk
@elonmusk · 17. Feb. 2026
Grok 4.20 is funny, based & smart 😂
Michael Wheatfill@mwheatfill· 17. Feb. 2026@wholemars Oh wow. Sonnet 4.6 and Opus 4.6 with Extended Thinking both failed this.
Grok 4.2 with 4 agents succeeded however.
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Elon Musk
@elonmusk · 17. Feb. 2026
Predicting the future accurately is the best measure of intelligence
X Freeze@XFreeze· 17. Feb. 2026The Grok 4.20 model that was crushing multiple AI leaderboards in predicting the future is officially released:
🏆 #1 on Alpha Arena – 35% returns in 10 days, holding 4 of the top 6 spots simultaneously
🏆 #1 on PredictionArena – Dominating real-money prediction markets
🏆 #2
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jp 🇺🇸
@jazzplane · 17. Feb. 2026
I like it too. Wish i could rename the agents
Elon Musk
@elonmusk · 17. Feb. 2026
Agent names are changing to:
000 “double uh-oh” 😂
001
002
Etc
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Taya Bass
@travelingflying · 17. Feb. 2026
Being "far-right" in 2026 just means having the same views as 99.9% of everyone who ever lived up until the 21st century...
We're just normal.
Elon Musk
@elonmusk · 17. Feb. 2026
True
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Nic Cruz Patane
@niccruzpatane · 17. Feb. 2026
Elon Musk on LiDAR:
“LiDAR also does not work well in snow, rain or dust due to reflection scatter. That’s why Waymos stop working in any heavy precipitation.”
Yesterday in LA:
Elon Musk@elonmusk· 26. Aug. 2025@raines1220 LiDAR also does not work well in snow, rain or dust due to reflection scatter. That’s why Waymos stop working in any heavy precipitation.
As I have said many times, there is a role for LiDAR in some circumstances and I personally oversaw the development of LiDAR for the SpaceX
Elon Musk
@elonmusk · 17. Feb. 2026
Yeah
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The Rabbit Hole
@TheRabbitHole · 17. Feb. 2026
16.8% of the UK population is foreign-born as of 2021
Elon Musk
@elonmusk · 17. Feb. 2026
Wow
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Aaron Burnett
@aaronburnett · 17. Feb. 2026
SpaceX is painfully serious about space data centers. They have a cyclotron to test their flight hardware. It’s not only data center hardware that benefits from this ramp up in testing cadence. But it’s not a huge leap to assume that there will be some data center chips headed
Christian Keil@pronounced_kyle· 17. Feb. 2026If you want data centers in space, you need radiation-tolerant chips.
Specifically, chips that survive both:
▸ a cumulative "total ionizing dose" (TID)
▸ bit-flipping, energetic particle strikes (SEE)
The latter is scariest. Google tested its Trillium chips and found that the
Elon Musk
@elonmusk · 17. Feb. 2026
Yes
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Elon Musk
@elonmusk · 17. Feb. 2026
Grok 4.2 will be about an order of magnitude smarter and faster than Grok 4 when the public beta concludes next month.
Still many bug fixes and improvements landing every day. The public beta gives us more critical feedback to address.
Aaron Burnett@aaronburnett· 17. Feb. 2026we're already using Grok 4.20 (agents) in our research process, from a research perspective it does feel like we jumped another 9.
I'm particularly a fan of the improved sourcing!
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Lex
@xw33bttv · 17. Feb. 2026
ruing technical terms here. Mixture of Experts (MoE) has literally nothing to do with what xAI actually shipped in 4.20.
This isn't one singular model, dense or MoE, with internal routing or sparse experts. It's four separate replicas (instanced) running at once in a quorum-st
Elon Musk
@elonmusk · 17. Feb. 2026
Correct
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Christopher Stanley
@cstanley · 17. Feb. 2026
It’s worth pointing out that ChatGPT 5.2 performed significantly worse on this test, as shown in the first image.
The second image shows Opus 4.6.
The third image shows Gemini Pro.
The fourth image shows Grok 4.2.
Elon Musk
@elonmusk · 17. Feb. 2026
Grok is most physically accurate of the four.
Opus rear bike frame makes no sense structurally, there is no connection from pedals to rear wheel, both legs of Pelican are on the right side of the bike and handle bars are disconnected.
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Elon Musk
@elonmusk · 17. Feb. 2026
Congratulations to the Tesla team on making the first production Cybercab!
Tesla@Tesla· 17. Feb. 2026First Cybercab off the production line at Giga Texas
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Elon Musk
@elonmusk · 17. Feb. 2026
The Grok 4.2 release candidate (public beta) is now available for use. You need to select it specifically.
Critical feedback is appreciated. Unlike prior versions of Grok, 4.2 is able to learn rapidly, so there will be improvements every week with release notes.
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Elon Musk
@elonmusk · 17. Feb. 2026
Europe extinctionists
Whatifalthist@whatifalthist· 17. Feb. 2026because the purpose is the end of their countries
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Derya Unutmaz, MD
@DeryaTR_ · 17. Feb. 2026
I just got access to Grok 4.20 beta & I’m testing it on biomedical questions; I can already say it has greatly improved. In fact, for a very complex experiment outcome prediction, Grok 4.20 gave an amazing response! I’d even say it’s the best I’ve seen from any model! Looking 👍!
Elon Musk
@elonmusk · 17. Feb. 2026
The foundations of 4.2 are such that it is able to improve every week, so the recursive intelligence growth will be strong
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Ian Miles Cheong
@ianmiles · 17. Feb. 2026
The monthly cost per illegal alien in Vienna far exceeds the average Austrian's salary.
It’s pretty shocking when you look at the numbers: the city is paying up to €18,000 a month for every unaccompanied, underage asylum seeker, and the reality is, many adult migrants just
Elon Musk
@elonmusk · 17. Feb. 2026
Wow
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Daniel Buck, “Youngest Old Man in Ed Reform”
@MrDanielBuck · 17. Feb. 2026
Since 2018, Chicago Public Schools has ADDED 6,343 employees while they LOST 35,364 students
Absolutely wild
Elon Musk
@elonmusk · 17. Feb. 2026
Wow
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Elon Musk
@elonmusk · 17. Feb. 2026
Demonstrable lies by @reidhoffman about his relationship with Epstein
Kevin Bass@kevinnbass· 17. Feb. 2026Since 2019, Reid Hoffman has made 13 testable public claims about Jeffrey Epstein:
1. He only had "few interactions" with Epstein
2. Those interactions were all "at the request of Joi Ito," then-director of the MIT Media Lab
3. They were all "for the purposes of fundraising for
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Gad Saad
@GadSaad · 17. Feb. 2026
Let me reiterate: @elonmusk purchasing this platform saved humanity.
Elon Musk
@elonmusk · 17. Feb. 2026
Thanks ❤️
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Elon Musk
@elonmusk · 17. Feb. 2026
Madness
Wide Awake Media@wideawake_media· 17. Feb. 202615-year-olds aren't old enough to use social media, but 5-year-olds are old enough to choose which gender they are.
Make it make sense. 🤡
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Elon Musk
@elonmusk · 17. Feb. 2026
Wow
Basil the Great@BasilTheGreat· 17. Feb. 2026Rupert Lowe wanted to deport rape gangs and the communities who protected them
Nigel Farage has just admitted on stage in front of thousands that he got rid of Rupert Lowe from Reform and made false claims to the Police about him because he wanted those gangs to stay in the UK
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