J. Bradford DeLong

J. Bradford DeLong

Creator
0 followers

Economist (Berkeley); fiscal/monetary history, global macro

MAMLMs Expose Current Limits of GPT-Style Models
SocialMay 18, 2026

MAMLMs Expose Current Limits of GPT-Style Models

MAMLMs—Modern Advanced Machine-Learning Models—applied to my “SubTuringBradBot” project. Hitherto it has mostly been failure modes of various kinds, and while the failure modes have been very interesting, as to the current limitations of GPTLLM MAMLMs software technology... 1/

By J. Bradford DeLong
On‑device AI Training Slashes Cloud Costs Dramatically
SocialMay 14, 2026

On‑device AI Training Slashes Cloud Costs Dramatically

Building a catechism out of 500MB of text, one GPU‑hour and hallucination at a time, as a month‑long on-device build_qa.py run to cut what would otherwise have been a $3,000 cloud bill by a factor of 1000 has to teach...

By J. Bradford DeLong
AI Arms Race: Trillions Burned or Future Shaped
SocialMay 12, 2026

AI Arms Race: Trillions Burned or Future Shaped

The current $1.5T AI arms race: are hyperscalers building utopia, building dystopia, building digital god, or simply lighting trillions of dollars on fire in a dollar auction? When “free cash flow” meets a once‑in‑a‑lifetime tech shock, balance sheets stop looking...

By J. Bradford DeLong
Exploring the Hidden “Creativity” Dial of LLMs
SocialMay 11, 2026

Exploring the Hidden “Creativity” Dial of LLMs

Turn it up for what?! Prettying the plumage on your stochastic parrot via the “secret” work of the LLM “creativity” dial. Behind the paywall because I am not at all sure that this is right. But I do find it...

By J. Bradford DeLong
From ENIAC to Nvidia: Powering the Idle Transistor Era
SocialMay 7, 2026

From ENIAC to Nvidia: Powering the Idle Transistor Era

A world full of dark compute as the journey from ENIAC to Nvidia built a world of idle transistors; or, your MacStudio vs. the planet’s datacenters: a thought experiment in silicon and power: **Well, I Can Hammer the CPUs & the...

By J. Bradford DeLong
When $160M Incomes Become Normal, Civilizations Vanish
SocialMay 5, 2026

When $160M Incomes Become Normal, Civilizations Vanish

How long do civilizations last? The Drake Equation, Bel‑Air mansions for everyone, & the Great Filter; or, where is everybody when $160 million a year incomes are normal? (Behind the paywall, at least initially, because I am not yet happy...

By J. Bradford DeLong
SubTuringBradBot Launches, Replacing FAQs with Interactive AI
SocialApr 20, 2026

SubTuringBradBot Launches, Replacing FAQs with Interactive AI

The dining-room-corner linear algebra experiment, or, why I am trying to build a BradBot instead of a FAQ list—SubTuringBradBot, office hours, gasbags, and “hexapodia”: **SubTuringBradBot Is Finally Live—at Least for Now: Monday MAMLMs** 2026-04-20 Mo

By J. Bradford DeLong
LLMs: Brilliant Pantomimes, Yet Unexpected Gaps
SocialApr 17, 2026

LLMs: Brilliant Pantomimes, Yet Unexpected Gaps

Behind the paywall because this is of interest only to those genuinely interested in closely following my MAMLM-interpretation & assessment journey. Current viewpoint: Pantomimes of thought: LLMs working so weirdly well except where they do not, as we traverse the......

By J. Bradford DeLong
Trump’s Pyrrhic Victory Leaves US Worse Off Than JCPOA
SocialApr 16, 2026

Trump’s Pyrrhic Victory Leaves US Worse Off Than JCPOA

Ex ante, I would have said that it would be very difficult for the United States to lose a war with Iran. Yet Trump—somehow—seems to have managed. A postwar state of affairs that is vastly worse than Obama’s JCPOA that...

By J. Bradford DeLong
LLMs Expose Hidden Biases of the American Right
SocialApr 16, 2026

LLMs Expose Hidden Biases of the American Right

Vermouth, covfefe, & ‘vermin’: What LLMs potentially have to teach Us About the American Right’s Id from Scott Bessent’s “Straits of Vermouth” to Trump’s “oranges of the investigation”. Our parapraxes are noisy but telling windows into the system prompts running...

By J. Bradford DeLong
Smart Shutoff Device Detects Leaks and Acts Instantly
SocialApr 16, 2026

Smart Shutoff Device Detects Leaks and Acts Instantly

A bulletin from the front: Brad vs. the Moen Flo Shutoff game-changing smart water device that monitors for leaks and immediately takes action to help prevent them. Yes, we are now in that Brave New World where “AI” doesn’t understand...

By J. Bradford DeLong
Apple’s Mac Mini Farm Beats Cloud AI Efficiency
SocialApr 11, 2026

Apple’s Mac Mini Farm Beats Cloud AI Efficiency

Marco Arment's Setup as the Canary in the Coal Mine—or, Rather, as the 50 Mac Mini Server Farm Vastly More Efficient than the NVIDIA-Powered Cloud-Bound Hyperscalers. Or, why John Giannandrea’s stewardship of Apple’s AI strategy may have meant that Apple...

By J. Bradford DeLong
NYT's Odd Cultural Coverage Targets Lord & Miller Films
SocialMar 28, 2026

NYT's Odd Cultural Coverage Targets Lord & Miller Films

**Yes, the "New York Times" Has Really Weird Cultural Coverage. Why Do You Ask?** As an institution, it seems that it really does not like that my cousin Phil Lord and his partner Chris Miller keep making movies that push back...

By J. Bradford DeLong
Funding the AI Data Centers Behind Massive MAMLMs
SocialMar 16, 2026

Funding the AI Data Centers Behind Massive MAMLMs

Monday MAMLMs: Where Will the Money to Pay for All the “AI” DataCenters Come From? Modern Advanced Machine-Learning Models (MAMLMs) will have value as very big-data, very high-demension, very flexible-function classification, prediction, and regression analyses. But will... 1/

By J. Bradford DeLong