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Ethan

@ethanrosenthal.com

data/ml/ai @ runway in πŸ—½ formerly spent time in startups, biggish tech, and physics labs www.ethanrosenthal.com

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Latest posts by Ethan @ethanrosenthal.com

gt;dr

(great title; didn’t read)

06.03.2026 00:42 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Post image

you and me both claude

05.03.2026 19:40 πŸ‘ 25 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
Socialize the Plan Anyone who tells you they have this current moment in coding figured out is lying to someone (you or themselves). I’m going to keep sharing half formed thoughts, and bits of things I’ve learned.

Blog: β€œSocialize the Plan” . On AI and Code Review - laughingmeme.org/2026/03/05/s...

05.03.2026 12:16 πŸ‘ 6 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
screenshot of a legend saying 
PENDING_NODE_ASSIGNMENT
RUNNING
FINISHED

screenshot of a legend saying PENDING_NODE_ASSIGNMENT RUNNING FINISHED

the 3 stages of life

03.03.2026 15:49 πŸ‘ 6 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Or maybe that’s deploying without looking at the agent’s code

03.03.2026 14:47 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Proposal to call STT vibe-coding from your phone β€œno-scoping”

03.03.2026 14:45 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Post image Post image Post image Post image

Exploring the AI Obedience: Why is Generating a Pure Color Image Harder than CyberPunk?

Hongyu Li, Kuan Liu, Yuan Chen, Juntao Hu, Huimin Lu, Guanjie Chen, Xue Liu, Guangming Lu, Hong Huang

tl;dr: Flux and NanoBanana fail at precise color filling.
arxiv.org/abs/2603.00166

03.03.2026 12:22 πŸ‘ 6 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0

If only, that’s the 2013 price!

01.03.2026 22:22 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

100%

01.03.2026 20:52 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I still have yet to live in an apartment with any of these after 17 years here

01.03.2026 20:42 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

NYC apartment amenities that shouldn’t be:

Ice maker
Garbage disposal
Bathroom fan

01.03.2026 20:42 πŸ‘ 4 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0
Preview
bart simpson is giving a speech at a podium while homer simpson is standing in the doorway ALT: bart simpson is giving a speech at a podium while homer simpson is standing in the doorway
28.02.2026 13:45 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Finally, we can get some money for AI.
Oh wait openai.com/index/scalin...

27.02.2026 14:29 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

lol

27.02.2026 12:45 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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Exceeds expectations

27.02.2026 12:16 πŸ‘ 2 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
Video thumbnail

Exceeds expectations

27.02.2026 12:16 πŸ‘ 2 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

When I was there, every team’s annual plan would always get scoped down due to headcount constraints. There was no lack of ambition for things to build. But all of a sudden you get a magic productivity wand and stick with the same scope? Very smelly

27.02.2026 01:30 πŸ‘ 6 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

What smells of bullshit is the fact that you’d expect companies to do more things with their newfound productivity rather than cut staff and maintain the same supposed output.

27.02.2026 01:30 πŸ‘ 9 πŸ” 3 πŸ’¬ 2 πŸ“Œ 0
A Krispy Kreme box that says crocs

A Krispy Kreme box that says crocs

The perfect crossover doesn’t exist-

26.02.2026 23:10 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Congrats…? Or not, since you’re left holding the bag. Either way, what a mess πŸ˜•

26.02.2026 22:46 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Insane. Hope you’re ok

26.02.2026 22:41 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Yup and yup. And my guess is that the first refactor (moving imports inside functions) will make the second refactor to lazy syntax even easier

26.02.2026 13:25 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Reducing large library import time is a nice task for claude code (or at least it will be until pep-810 lands peps.python.org/pep-0810/)

26.02.2026 12:50 πŸ‘ 4 πŸ” 1 πŸ’¬ 2 πŸ“Œ 0
Preview
Sizing chaos The inter-generational struggle to find clothes that fit more than a tiny portion of women

This data viz is incredible (as per usual for them) pudding.cool/2026/02/wome...

It also brought me back to my days at Dia&Co, struggling to algorithmically get sizing and body shape right.

25.02.2026 14:49 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Everybody who has worked at an OSS company should start charging a bunch of money to consult on business models

25.02.2026 13:53 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Maybe AI is less about software companies having no moat and more like they’re all now open source companies.

25.02.2026 13:53 πŸ‘ 5 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
A grill and a table on a balcony with a light dusting of snow

A grill and a table on a balcony with a light dusting of snow

A grill and a table on a balcony with a half inch of snow

A grill and a table on a balcony with a half inch of snow

A grill and a table on a balcony with like a foot of snow

A grill and a table on a balcony with like a foot of snow

Solid snow progress

23.02.2026 13:26 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

That’s the same hospital boat sent, with great fanfare, to NYC during the pandemic (that ended up doing nothing).

It’s like when they reuse parts of an old movie set on a new production.

22.02.2026 16:20 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Delivery fee
This fee covers delivery-related costs for the restaurant and is based in part on the delivery location you provided. THIS PRICE WAS SET BY AN ALGORITHM USING YOUR PERSONAL DATA.
Got it

Delivery fee This fee covers delivery-related costs for the restaurant and is based in part on the delivery location you provided. THIS PRICE WAS SET BY AN ALGORITHM USING YOUR PERSONAL DATA. Got it

My first time coming across the new NY law requiring this disclosure.

If this GrubHub delivery fee only uses my location, then I get it, and the disclosure makes it sound more nefarious than it actually is.

If the delivery fee uses other data, like my proclivity to tip, then this is pretty suss.

22.02.2026 14:07 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Memorization vs. generalization in deep learning: implicit biases, benign overfitting, and more Or: how I learned to stop worrying and love the memorization

What is the relationship between memorization and generalization in AI? Is there a fundamental tradeoff? In infinitefaculty.substack.com/p/memorizati... I’ve reviewed some of the evolving perspectives on memorization & generalization in machine learning, from classic perspectives through LLMs.

18.02.2026 15:54 πŸ‘ 133 πŸ” 27 πŸ’¬ 4 πŸ“Œ 5