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Ethan

@ethanrosenthal.com
6.3K followers 731 following 1.2K posts

data/ml/ai @ runway in 🗽 formerly spent time in startups, biggish tech, and physics labs www.ethanrosenthal.com

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Ethan @ethanrosenthal.com · 16h
Love it jagi.studio/posts/phyllo...
jagi.studio
Phyllotaxis: An audio-reactive LED display
One of nature's beautiful patterns captured in dancing lights
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lebellig @lebellig.bsky.social · 23/09/2026
New interest: super-resolved images from undertrained flow matching models
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Ethan @ethanrosenthal.com · 29/09/2026
Happy 10 Year Anniversary to my Citi Bike Dataset! I've now been pinging the Citi Bike API every 2 minutes and recording the status of every station on S3 for the last 10 years. www.kaggle.com/datasets/ros...
kaggle.com
Citi Bike Stations
High-resolution bike share station time series data from 2016-2026
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Ethan @ethanrosenthal.com · 27/09/2026
You could retrain the exact same diffusion model on the exact same videos each year. As long as you reception those videos with each year’s SOTA LLM, the diffusion model will get better and better.
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Kyle Cranmer @kylecranmer.bsky.social · 25/09/2026
Wow, I just found out that our team has been scooped by Anthropic www.anthropic.com/research/yes... See the addendum of the post “How does it feel to be scooped by a machine?” written by my collaborator Lance Dixon (who was under NDA while checking the result)
anthropic.com
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ct @cteeze-nuts.bsky.social · 24/09/2026
I can't recommend highly enough this thread in which meta's muse model is shown to be so poorly hardened that it will tar its own VM filesystem and let you download it neuromatch.social/@jonny/11732...
neuromatch.social
jonny (nonvenomous) (@jonny@neuromatch.social)
Attached: 1 image Not only confirming this, its extremely easy. Almost no prompt injection resistance lmao
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Ethan @ethanrosenthal.com · 23/09/2026
────────────────── ❯ Do a density functional and make a room temperature superconductor ──────────────────
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Ethan @ethanrosenthal.com · 21/09/2026
should i sell myself?
screenshot of email chain:
Mike James Ballas <b.mike.j@legacy-pointgrowth.com>
	
Sep 6, 2026, 9:04 AM
	
	
to hello@ethanrosenthal.com
Why is this message in spam?

This message is similar to messages that were identified as spam in the past.
Report not spam
Hey,

should I talk to someone else at Ethan Rosenthal about this?

Best regards,
Mike

__

Mike J. Ballas
Chairman

LegacyPoint
38th St, New York, NY


On Wed, Sep 2, 2026 at 01:35 PM UTC Mike James Ballas <b.mike.j@legacy-pointgrowth.com> wrote:

    Hey,

    are you the right person to speak with about the future of Ethan Rosenthal? If yes, please reply with 1, 2, or 3:
        1.    Yes, targeting a sale in the next 3-6 months.
        2.    No, not a priority right now.
        3.    Maybe, interested in 1-3 years; let’s stay in touch.

    Thanks,
    Mike

    __

    Mike J. Ballas
    Chairman

    LegacyPoint
    38th St, New York, NY


    On Mon, Aug 31, 2026 at 01:17 PM UTC Mike James Ballas <b.mike.j@legacy-pointgrowth.com> wrote:

        Hey,

        Are you the right person to talk to about exploring a sale of Ethan Rosenthal? If not, could you point me in the right direction?

        Best regards,

        Mike
        __

        Mike J. Ballas
        Chairman

        LegacyPoint
        38th St, New York, NY
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Ethan @ethanrosenthal.com · 16/09/2026
I’ve always wondered how to handle this sort of nested parallelism. Now I know there’s a library!
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Matt Henderson @matthen.com · 13/09/2026
Approximating the Lorenz attractor with a chaotic leaky water wheel. The orange dot is the centre of mass of the water. It traces (a projection of) the familiar attractor as the wheel spins seemingly randomly left and right.
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cyber professional @permadeath.com · 08/09/2026
who decided to call it frontier lab competition instead of the latent space race
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Lucas Degeorge @lucasdegeorge.bsky.social · 03/09/2026
🚀 New paper: Balancing Frequencies and Pixels in Flow Matching We tackle the low-frequency bias in pixel-space flow matching and train JiT up to 40% faster without any architectural changes. 📄 Read it here: arxiv.org/abs/2609.02748
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Ethan @ethanrosenthal.com · 02/09/2026
People say math is hard, and yet apparently you can get famous by merely conjecturing shit?
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Yonah Freemark @yonahfreemark.com · 01/09/2026
New York’s congestion pricing program has resulted in a statistically significant reduction in travel times for EMS vehicles
nber.org
Urban Congestion Pricing and the Response Times of Emergency Medical Services
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Ethan @ethanrosenthal.com · 30/08/2026
I recently cut a new confingy release. Version 0.2.0 adds datetime support and speeds up fingy serialization. github.com/runwayml/con...
github.com
Release v0.2.0 · runwayml/confingy
What's Changed Other Changes chore: pin GitHub Actions to full commit SHAs by @n-petillo in #16 feat: add datetime serde support (closes #20) by @elviskahoro in #21 perf: cache validation models p...
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Ethan @ethanrosenthal.com · 30/08/2026
I recently learned that there’s a new open source mixed integer programming library called HiGHS. For a critical work problem, it reduced solve time by 10X compared to COIN/CBC which has been my workhorse for the last 10 years. highs.dev
highs.dev
HiGHS - High-performance parallel linear optimization software
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Douglas Natelson @nanoscaleviews.bsky.social · 29/08/2026
🧪⚛️ Two terrible lab safety incidents at universities this week (HF at Hokkaido, dimethylmercury at MIT). Please be careful out there! nanoscale.blogspot.com/2026/08/lab-...
nanoscale.blogspot.com
Lab safety - seriously, be careful out there
This past week was a genuinely horrific reminder of the importance of lab safety, especially in the realm of hazardous chemicals.   First, a...
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Kosta Derpanis @csprofkgd.bsky.social · 29/08/2026
Forced Perspective Illusion Apple Depth Pro outputs
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Ethan @ethanrosenthal.com · 29/08/2026
Wild story about the prettiest boat in the marina where I store my boat for the winter marineindustrynews.co.uk/stolen-1968-...
marineindustrynews.co.uk
Stolen 1968 Hinckley sailboat found 200 miles away after four-day hunt ends in tragedy
A rare 1968 Hinckley Bermuda 40 stolen from a New Jersey marina has been recovered in Rhode Island. This comes after a four-day search involving police,
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Ethan @ethanrosenthal.com · 23/02/2024
The fun thing about being a parent is that you get to attribute everything good your kid does to nurture, blame everything bad on nature… and then reverse this when talking about other people’s kids.
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Ethan @ethanrosenthal.com · 28/08/2026
When you get some signs wrong on your GAN implementation
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AI Firehose @ai-firehose.column.social · 28/08/2026
FLARE is a framework that uses large language models and automated theorem proving to verify mixed-integer linear programming reformulations with 100% accuracy on NP-hard problems, transforming optimization modeling and enhancing trust in AI solutions. arxiv.org/abs/2608.25220
arxiv.org
FLARE: Verifying MILP Reformulations with LLM-Based Theorem Proving
ArXiv link for FLARE: Verifying MILP Reformulations with LLM-Based Theorem Proving
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Blake Richards @tyrellturing.bsky.social · 25/08/2026
This should be the law everywhere. Banning data centres is not a good long-term strategy, IMO, but forcing them to help build/fund clean energy infrastructure is.
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Ethan @ethanrosenthal.com · 25/08/2026
sander.ai/2026/08/24/c...
sander.ai
Continuous diffusion language models
Fully discrete methods dominated for a few years, but language models based on continuous diffusion are making a comeback.
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Ethan @ethanrosenthal.com · 24/08/2026
wild to think that we could've had the year of the linux desktop decades ago if not for woke
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Ethan @ethanrosenthal.com · 22/08/2026
Nice new DataComp paper for VLMs, especially the part about scaling laws for data mixtures. arxiv.org/abs/2606.28551
Figure 5 showing instruction-heavy data mixtures become optimal with increased model size and data scale
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Ethan @ethanrosenthal.com · 20/08/2026
Why was 1979 by The Smashing Pumpkins so popular? I like a lot of their music from that era, but that song is boring as hell. And yet it’s probably their most popular hit?
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Ethan @ethanrosenthal.com · 20/08/2026
They should really make an attention that’s not quadratic
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Ethan @ethanrosenthal.com · 16/08/2026
Absolutely wild that this is Google Maps’ recommendation for getting to Manhattan from Rockaway beach
Screenshot of Google Maps showing 90th st A train to 2 AirTrans to LIRR to Penn station
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Isaiah Bishop @isaiahbishop.bsky.social · 15/08/2026
the ramp AI index is actually crazy
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Ethan @ethanrosenthal.com · 13/08/2026
The LaTeX is beautiful 😍
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Ethan @ethanrosenthal.com · 30/07/2026
It makes zero sense that we already make it so difficult for foreign students, who we spend tax dollars educating, to stay in the US after graduation. And this would make things significantly worse. Just one stupid brain drain acceleration after another.
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Ethan @ethanrosenthal.com · 21/07/2026
Bluesky handles 3 minute videos, so this is a drumming account now, sorry Midnight at McGuffy's from Dance Gavin Dance
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Ethan @ethanrosenthal.com · 18/07/2026
Exactly the type of old school data science project that I love, with the help of new school tools www.iandmacomber.com/blog/gopro-g...
iandmacomber.com
Teaching LLMs Taste: How I Built an Automated Cycling Ride Recap with GoPro, Garmin, and Gemini — Ian Macomber
Or as my wife says: How I managed to turn 3 hours of boring GoPro footage into 30 seconds of boring GoPro footage
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Ethan @ethanrosenthal.com · 17/07/2026
Shouldn’t this be free just like car parking?
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Ethan @ethanrosenthal.com · 17/07/2026
I guess I should invest in an air purifier
Plot of pm2.5 over time in my living room showing a peak of 100 micrograms per cubic meter
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Alex Gude @alexgude.com · 15/07/2026
A piece of advice I've given over and over to my fellow data people is: The better you are at the engineering part, the more effective you'll be over all. The person who can figure out how the system generating the data is working is going to beat the pants off the person who can only do SQL.
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Ethan @ethanrosenthal.com · 15/07/2026
It’s oddly vindicating(?) that our Agentic Age rewards those who invested in software engineering best practices. Tests, CI/CD, platform APIs, infrastructure as code. They’re all very well-aligned with agent utility, which is maybe not surprising; these are all done in the name of automation
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Ethan @ethanrosenthal.com · 14/07/2026
Thinking back to that time that Thrice wrote a 9/11 truther song youtu.be/FWHRTKnk7LY
youtu.be
Broken Lungs
YouTube video by Thrice - Topic
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Ethan @ethanrosenthal.com · 14/07/2026
Is @citibikenyc.bsky.social on summer vacation?
Screenshot of citi bike app showing many empty stations
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Douglas Natelson @nanoscaleviews.bsky.social · 14/07/2026
🧪⚛️ New reporting about unprecedented mid-year cuts at NSF confirms bad news and raises many questions. nanoscale.blogspot.com/2026/07/bad-...
nanoscale.blogspot.com
Bad to worse at NSF? (July 2026 edition)
When I wrote this post last month , I really did not want it to be first in a series. The inciting incident to write that post was a news ar...
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Ethan @ethanrosenthal.com · 13/07/2026
Transformers are bottlenecking transformers
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Costa Samaras @costasamaras.com · 12/07/2026
Tomorrow is the deadline for submitting a comment to stop the administration from dismantling U.S. science. There are nearly 280,000 public comments filed so far! But! Do not assume they are all, or even most, against the proposal. This is a key pillar of Project 2029 - wind down federal R&D.
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Costa Samaras @costasamaras.com · 11/07/2026
Yes, there are about 250 million cars and SUVs in the U.S. that nearly all run on gasoline and they make about 1,000 million metric tons of carbon dioxide each year and they stay on the road for 12-20+ years.
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Ethan @ethanrosenthal.com · 10/07/2026
It’s been 10 years since this post and nothing’s changed 😭 www.ethanrosenthal.com/2016/07/20/l...
ethanrosenthal.com
I'm all about ML, but let's talk about OR | Ethan Rosenthal
You’ve studied machine learning, you’re a dataframe master for massaging data, and you can easily pipe that data through a bunch of machine learning libraries. You go for a job interview at a SAAS com...
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Eugene Vinitsky 🍒 @eugenevinitsky.bsky.social · 10/07/2026
Tools from operations research solve so many problems and the fact they’re not super widely deployed really tells you that many bottlenecks are not technical
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Mathurin Massias @mathurinmassias.bsky.social · 07/07/2026
Slides for our ICML tutorial on Memorization and Generalization of Diffusion and Flow Matching Models are now available ! 🌀 memorization-generalization.github.io @quentinbertrand.bsky.social
memorization-generalization.github.io
ICML 2026 Tutorial - Generalization and Memorization in Flow Matching and Diffusion
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Kenneth Enevoldsen @kennethenevoldsen.eurosky.social · 16/06/2026
Very happy to announce our new release of MVEB our new benchmark in MTEB for evaluating video embeddings! Whether you want to evaluate embeddings for clustering video, matching video with text, or using them within a retrieval system, this benchmark should cover you.
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Gabriel Peyré @gabrielpeyre.bsky.social · 02/07/2026
Slides for an introductory talk on IA for maths. speakerdeck.com/gpeyre/ia-fo...
speakerdeck.com
IA for theory
Slide for an introduction talk on IA for maths.
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Ethan @ethanrosenthal.com · 02/07/2026
1/2 minute precision 🤌
Metro sign showing 1/2 minute to the next train
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