Hacker News: jcheng

New comment by jcheng in "Tesla Roadster"

jcheng — Sat, 17 Oct 2026 15:07:36 +0000

I thought they said 1700kg (Hagerty video)

New comment by jcheng in "Tesla Roadster"

jcheng — Fri, 16 Oct 2026 02:39:39 +0000

Reading https://www.tesla.com/roadster, it seems like both variants only use cold gas thrusters, and the difference is that the "normal" (lol) one only has them pointed rearwards while the flying one has them pointed in all different directions as well.

New comment by jcheng in "MIT class project turns into an FDA-cleared treatment for tremors"

jcheng — Tue, 13 Oct 2026 23:40:56 +0000

Whoa, I thought that was a typo... when did EECS go to four digits?

So 6.0002 is pronounced "six triple oh two"?

New comment by jcheng in "Character.ai has initiated voluntary Chapter 11 bankruptcy"

jcheng — Tue, 13 Oct 2026 21:08:17 +0000

*Matt Levine

New comment by jcheng in "Intel D270 GPU AI Accelerator–Up to 480 GB LPDDR5X"

jcheng — Tue, 13 Oct 2026 09:20:39 +0000

I wonder how this compares to a hard(-ish) cap on Sonnet-and-better models, and unlimited access to Haiku. That’s one of the policies we’re considering.

New comment by jcheng in "OpenAI annualised revenues $20B less than previously signalled"

jcheng — Fri, 09 Oct 2026 11:58:08 +0000

That's not required, merely that the labs _think_ there is a _chance_ (like Coxon's 10%) that they are on the verge of it.

New comment by jcheng in "OpenTPU – An open-source AI accelerator, developed by AI"

jcheng — Wed, 07 Oct 2026 14:14:10 +0000

Financial Independence, Retire Early. It's a whole subculture online, based around the idea that if you can grow your investments to ~25X your annual expenses, you can safely stop working and live off those investments.

https://www.mrmoneymustache.com/2012/05/29/how-much-do-i-nee...

In some kind of economic AI apocalypse, though, who knows if the assumptions behind FIRE will hold.

New comment by jcheng in "Owed a billion dollars in Nvidia stock"

jcheng — Mon, 28 Sep 2026 03:14:28 +0000

Those shares were fine, it was the other 9,375 that were in question here.

New comment by jcheng in "How OpenAI Used Its Own LLMs to Design Its Jalapeño Chip"

jcheng — Sat, 19 Sep 2026 10:42:51 +0000

> Am I missing something?

If you’re sincerely asking…

Mathematically speaking, 18 / 3.6 isn’t “reducing” by 3.6X, it’s “dividing” by 3.6X. Reducing would be 18 - (18 * 3.6), which is obviously wrong. By your formula, “reducing by 50%” would be 18 / 0.5, also obviously wrong.

Yes, people do say things like “reduce by 3.6X” and are understood to mean what you said, but they also say “literally” when they mean “figuratively”. It doesn’t bother me but I can understand why math oriented people would be annoyed, and I personally would never say “reduced by 3.6X”, but instead “reduced by 72.2%”.

New comment by jcheng in "Ask HN: Who is using MCP in production?"

jcheng — Fri, 04 Sep 2026 02:25:57 +0000

They probably mean the tool APIs that the MCP server exposes are well designed. Definitely makes a big difference.

New comment by jcheng in "Being ambitious and being a dad"

jcheng — Wed, 19 Aug 2026 11:04:56 +0000

My own accomplishments make me go wheeeee but my kids’ accomplishments, even mundane ones, make me go WHEEEEEEEEE!

New comment by jcheng in "Meta data center water discharges suspended for contaminating water supply"

jcheng — Sat, 04 Jul 2026 18:23:14 +0000

According to the article this is a closed loop cooling system, once it’s up and running it doesn’t use any water. They run water through it during installation and that’s the discharge that they found bacteria in.

New comment by jcheng in "Show HN: Zanagrams"

jcheng — Sun, 28 Jun 2026 22:01:25 +0000

Fun game! On iOS I frequently triggered a double-tap zoom accidentally, and it’s weirdly difficult to zoom back out once that happens (a second double-tap doesn’t work, and pinch to zoom out only works in some areas of the page).

New comment by jcheng in "Show HN: Monolisa v3 – a typeface for developers and creatives"

jcheng — Thu, 25 Jun 2026 00:16:55 +0000

https://en.wikipedia.org/wiki/Menu_key is all I can think of, but that was introduced in 1994...

New comment by jcheng in "Pandoc Templates"

jcheng — Sun, 31 May 2026 14:16:34 +0000

I'm curious if Quarto could coordinate all of that for you automatically. It supports both code execution via Jupyter, and output via Typst (including books).

https://quarto.org/docs/computations/python.html

https://quarto.org/docs/output-formats/typst.html

https://quarto.org/docs/books/book-output.html#typst-output

https://quarto.org/docs/output-formats/typst-custom.html#boo...

New comment by jcheng in "Dropbox CEO Drew Houston to step down"

jcheng — Tue, 26 May 2026 22:36:14 +0000

Poor Drew, if only he’d taken Steve’s advice! /s

New comment by jcheng in "Greg Brockman interview [video]"

jcheng — Mon, 25 May 2026 00:01:31 +0000

I think you make a good point but the use of samples in hip hop doesn’t support it; those samples need to be licensed.

New comment by jcheng in "Qwen3.7-Max: The Agent Frontier"

jcheng — Wed, 20 May 2026 17:45:44 +0000

Here are some examples of the questions in the benchmark. If these are representative, they seem pretty cut and dry. https://artificialanalysis.ai/evaluations/omniscience#exampl...

New comment by jcheng in "Disney erased FiveThirtyEight"

jcheng — Tue, 19 May 2026 22:49:00 +0000

"Sometimes you have to change things that are perfectly good just to make them your own." --Jack Donaghy, 30 Rock

New comment by jcheng in "Mercedes-Benz commits to bringing back physical buttons"

jcheng — Mon, 04 May 2026 15:43:22 +0000

Former E36 owner here as well. What are "monkey pissers"?