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Matthew Prince 🌥
@eastdakota · 28 мая 2026 г.
There’s a ton of headroom to better optimize AI training and inference.
Elon Musk@elonmusk· 28 мая 2026 г.SpaceX has almost finished writing V1.0 of an in-house AI training stack in C that exact-maps to 220k GB300s with 800G NICs, making heavy use of pipeline parallelism and getting as close to bare metal as possible.
The potential speed improvement vs JAX for large training runs is
Elon Musk
@elonmusk · 28 мая 2026 г.
Yes.
It’s not that we’ve discovered some magic bullet, but rather that JAX, or at least the open source version of it, is mostly optimized for small to medium-sized training runs on Google TPUs, whereas we need to massive training runs on Nvidia GPUs.
Pipeline parallelism is essential and crushes fully-sharded data parallelism at scale.
And C will compile to the most efficient binary short of assembly. Maybe we will do a little assembly too.
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maharshi
@maharshii · 28 мая 2026 г.
they made an in-house AI training stack from scratch in C as a hobby project
Elon Musk@elonmusk· 28 мая 2026 г.SpaceX has almost finished writing V1.0 of an in-house AI training stack in C that exact-maps to 220k GB300s with 800G NICs, making heavy use of pipeline parallelism and getting as close to bare metal as possible.
The potential speed improvement vs JAX for large training runs is
Elon Musk
@elonmusk · 28 мая 2026 г.
It’s essential or we simply cannot be competitive
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Robert Jenrick
@RobertJenrick · 28 мая 2026 г.
Sorry isn’t good enough.
We need to see the body-worn footage and these officers need to face consequences.
The treatment of this murdered student, in his dying moments, is a national scandal.
Elon Musk
@elonmusk · 28 мая 2026 г.
Absolutely
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Kazim Raza
@KazimAIZJU · 28 мая 2026 г.
Makes sense for shaving latency in tight RL loops. Curious how you handle memory safety in C without the C++ guardrails
Elon Musk
@elonmusk · 28 мая 2026 г.
With great {malloc} power comes great responsibility
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Claude
@claudeai · 28 мая 2026 г.
Introducing Claude Opus 4.8: it builds on Opus 4.7 with sharper judgment, more honesty about its own progress, and the ability to work independently for longer than its predecessors.
Available today at the same price.
Elon Musk
@elonmusk · 28 мая 2026 г.
Nice work
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Basil the Great
@BasilTheGreat · 28 мая 2026 г.
🚨BREAKING: HAMPSHIRE POLICE APOLOGISE FOR ARRESTING HENRY NOWAK AS HE DIED IN STREET
Robert France, temporary deputy chief constable for Hampshire Police has said he's "sorry" his officers arrested Henry in the moments before he died
NOT GOOD ENOUGH
They must pay for their
Elon Musk
@elonmusk · 28 мая 2026 г.
Not even close to good enough. Those officers committed a serious crime.
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ApoStructura
@ApoStructura · 28 мая 2026 г.
I love that SpaceX is becoming the classic tech megacorp from sci fi.
The only thing missing is a badass hq tower
Elon Musk@elonmusk· 28 мая 2026 г.SpaceX has almost finished writing V1.0 of an in-house AI training stack in C that exact-maps to 220k GB300s with 800G NICs, making heavy use of pipeline parallelism and getting as close to bare metal as possible.
The potential speed improvement vs JAX for large training runs is
Elon Musk
@elonmusk · 28 мая 2026 г.
We do kinda have that at Starbase
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Tommy Robinson 🇬🇧
@TRobinsonNewEra · 28 мая 2026 г.
So @HantsPolice laughed as Henry Nowak was dying, they took his and his dad's phones to search for "racism" in a sickening attempt to justify his murder!
Elon Musk
@elonmusk · 28 мая 2026 г.
Those hateful police are accessories to murder
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New York Post
@nypost · 28 мая 2026 г.
Four stabbed by knifeman shouting 'Allahu Akbar' at Switzerland train station in front of terrified children trib.al/HGdP77Q
Elon Musk
@elonmusk · 28 мая 2026 г.
!!
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Beff (e/acc)
@beffjezos · 28 мая 2026 г.
The rarest object type in the universe isn't black holes. It's us. Conscious matter. The flame of life.
We have a duty to expand it in scope and scale in order to preserve it.
Elon Musk
@elonmusk · 28 мая 2026 г.
Yes
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Gavin Baker
@GavinSBaker · 27 мая 2026 г.
Composer 2.5 being Pareto dominant in coding per CursorBench is important.
This is after only a few weeks of supplemental training and/or RL in the Colossus 2 cluster.
The 1.5 trillion parameter version of Grok will likely be a much better base model than Kimi. We shall see.
Elon Musk
@elonmusk · 28 мая 2026 г.
Grok 1.5T is trending well
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Pascal
@pascal__2k · 28 мая 2026 г.
Will it be used for Grok v5?
Elon Musk
@elonmusk · 28 мая 2026 г.
Yes
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Rothmus 🏴
@Rothmus · 28 мая 2026 г.
Never been more true
Elon Musk
@elonmusk · 28 мая 2026 г.
Banger
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Elon Musk
@elonmusk · 28 мая 2026 г.
Ответ на @JohnTinsman
SpaceX has not committed to leasing Colossus for years, although it’s possible that may be what happens.
This is a 180 day lease with 90 day notice mutual cancellation thereafter. The short term was our request, not Anthropic’s.
We won’t leave them hanging and will provide a reasonable off-ramp, but if compute gets super tight I said we might need it back at some point.
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Polymarket
@Polymarket · 27 мая 2026 г.
JUST IN: FBI arrests senior CIA official after uncovering over $40 million in gold bars & $2 million in cash at his Virginia home.
Elon Musk
@elonmusk · 28 мая 2026 г.
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John LeFevre
@JohnLeFevre · 27 мая 2026 г.
Hollywood is cooked.
Even Oscar winner Natalie Portman is out here doing luxury train promos like a mid-tier influencer.
My kids and their friends haven’t watched a movie or TV show in years. It’s all YouTube.
The entire industry is running on fumes.
Elon Musk
@elonmusk · 28 мая 2026 г.
Train looks great
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S.E. Robinson, Jr.
@SERobinsonJr · 27 мая 2026 г.
BORING NEWS: New Orleans Mayor Helena Moreno has formally proposed the one-mile NOLA LOOP!
The route would run under Loyola Avenue from near the Hyatt Regency and City Hall, beneath Poydras Street, to the Convention Center Boulevard and Julia Street.
Moreno’s application lays
S.E. Robinson, Jr.@SERobinsonJr· 27 мая 2026 г.Elon Musk
@elonmusk · 28 мая 2026 г.
Cool
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Elon Musk
@elonmusk · 27 мая 2026 г.
Prices are critical information without an economy cannot function
Rothmus 🏴@Rothmus· 26 мая 2026 г.As a young socialist, Hayek read Ludwig von Mises’ 1920 paper “Economic Calculation in the Socialist Commonwealth.”
Mises showed that socialist central planning isn’t merely inefficient, it’s impossible.
Without private property and genuine market prices, planners lack any
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Elon Musk
@elonmusk · 27 мая 2026 г.
Wise words
Brivael Le Pogam@brivael· 27 мая 2026 г.Dans le manifeste "techno-optimiste" de Marc Andreessen, il y a une phrase qui m'a marqué :
"Our enemies are not bad people – but rather bad ideas."
Nos ennemis ne sont pas des mauvaises personnes. Ce sont des mauvaises idées.
Prenons Jancovici. L'homme est brillant, sincère,
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Elon Musk
@elonmusk · 27 мая 2026 г.
Thank Heaven for the First Amendment in America!
Kevin Bass@kevinnbass· 27 мая 2026 г.The truth is called hateful in Belgium. Therefore speaking it is against the law.
This is more frightening than calling the truth "misinformation". They have stopped pretending completely. They are openly admitting that they have criminalized the truth.
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