đź©» Radiologist & MRI clinic owner | Chaired committee writing U.S. MRI accreditation standards | Filmmaker | All tweets IMO | No investment/medical advice
Bluffton, SC
Joined May 2013
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The moment your 3T high-definition whole-body MRI is done, I sit down with you and review every finding. I developed the national MRI accreditation standards Medicare adopted in 2011, and I bring 20+ years as an MRI specialist to the AI-enhanced read of all 5,000+ images. mriatbelfair.com
A. Joseph Borelli, Jr., MD retweeted
Sad day for America. A hard-working legal immigrant who built a trillion-dollar company from Denny’s on his own dime could be dragged down overnight, while the opposite side made it all the way to the political podium.
Which side raised America to the powerhouse of technical advancement?
Whoever casts stones from the shadows is never on the side of the saint.
A. Joseph Borelli, Jr., MD retweeted
First time in a Cybercab
No steering wheel âś…
Very comfortable seat and cabin âś…
Smooth ride âś…
They’re everywhere in Austin, you can’t pass a block in the downtown without seeing at least one.
A vision-based, safety-critical robotics system working at scale. What a time to be alive!!
A. Joseph Borelli, Jr., MD retweeted
Elon, 1M Tesla-owned Cybercabs at scale seem to require 20k new stalls per year. You’re adding ~6k. What am I missing?
At 30-second takt, one line does 1M Cybercabs per year. Convert the Cybertruck line, and that’s 2M.
One stall can support ~50 Cybercabs with overnight + some daytime charging.
So 1M vehicles need ~20,000 new stalls every year.
Grid interconnection still takes ~12 months on average.
Megapacks are almost sold out through 2027, so they can’t serve as a workaround for the grid bottleneck.
And we don’t see a massive Supercharger build-out ramp underway.
You said Tesla will mostly own the fleet.
How are you going to charge them at that scale?
Wouldn’t it be far simpler to sell them to private owners who can charge, stage, and clean them at home?
~80% of EV charging already happens at home today; public infrastructure has never been able to support large numbers of vehicles on its own.
@elonmusk
MRI interpretation at the frontier:
I vibe-coded the volume-rendered 3D reconstruction with @grok Build 4.7, then handed the video to @claudeai Fable 5.2 for academic neuroradiologist-level expert analysis and diagnosis, likely costing under $0.05. How long before @bot can do it all in one shot @elonmusk?
The images to the right show the AI’s analysis of the MP4 videos of a 360° volume-rendered rotation of the intracranial MR angiogram. Fable 5.2 identified the aneurysm, zoomed in, and analyzed it unprompted, distinguishing it from infundibular ectasia. It also recommended evidence-based follow-up MRA in 6 months with guideline references.
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A. Joseph Borelli, Jr., MD retweeted
Elon Musk just revealed a massive update on Grok 4.8, and SpaceXSI has completely rebuilt its reinforcement learning and inference infrastructure from scratch
The engineering team has abandoned JAX and SGLang, rewriting the entire RL and inference stack in C/C++
Here’s where Grok 4.8 stands:
• Pre-training is complete
• Major cleanup of supervised fine-tuning data
• Reinforcement learning now underway
• Evaluation scores are starting to climb
• Soft rollout to Grok Bot users planned for later this week
And Elon also gave another imp update about Grok 4.8:
“Grok 4.8 will bear no resemblance to 4.7 (thankfully)”
He also explained why the development took longer than expected:
“It is not yet incredible, but, this time, the foundations are built right, so I expect it to evolve to be something special”
This is a fundamental engineering overhaul, not just another model upgrade
SpaceXSI has rewritten the underlying infrastructure to build a much stronger foundation for Grok’s future development.
And the first Grok Bot users are expected to get their hands on it this week
We have dumped JAX/SGLang and rewritten the entire RL and inference stack from scratch in C/C++, which took some extra time.
Training (aka pre-training) is done. Lot of cleanup was needed on the SFT data to get that mostly right. Now, 4.8 is in RL and the evals are starting to climb. We will do a soft rollout to Bot users later this week and see how it goes.
Grok 4.8 will bear no resemblance to 4.7 (thankfully). It is not yet incredible, but, this time, the foundations are built right, so I expect it to evolve to be something special.
A. Joseph Borelli, Jr., MD retweeted
Most people don’t know that the best-selling car in the world is the Tesla Model Y.
And the second and third best-selling cars are much cheaper.
Tesla Model Y has been the world’s best-selling passenger vehicle for 3 consecutive years
2023 → #1
2024 → #1
2025 → #1
Model Y alone has surpassed 4 million global sales, while Tesla has now delivered more than 10 million vehicles worldwide
Not just the best-selling EV
Model Y beat every gas, hybrid and electric passenger vehicle worldwide for three straight years
An electric car reaching this scale would have sounded impossible not long ago
Now millions of Model Ys are on roads around the world
A. Joseph Borelli, Jr., MD retweeted
Since 2017, I've been repeatedly told that end-to-end AI can't be safe, and traditional rule-based systems are required for autonomous driving.
But we persevered. Today we are releasing our strategy for Learned Safety, the result of a decade of research.
wayve.ai/technology/learned-…
A. Joseph Borelli, Jr., MD retweeted
If you sponsor this podcast, calling for the execution of Elon Musk, I will never use your product… and will buy from both of your top two competitors
This is unacceptable and dangerous.
This a dog whistle to murder someone because you disagree with them — and this is the same guy who joked about the assassination against President Trump.
Fuck this piece of shit.
