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jychang

2,999 karma · joined October 23, 2012

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jychang··on The top secret URSALA, RAQUEL, and FARRAH satellites (2025)
You are the comment in this thread of BS speculation that is closest to nailing the truth.

Hans Mark

Director of NASA Ames 1969-1977

Director of the NRO 1977-1979

Deputy Director of NASA 1981-1984

I’ll let you take that piece of information and decide if NASA leadership knew about the NRO or not when Hubble launched in 1985.

jychang··on The top secret URSALA, RAQUEL, and FARRAH satellites (2025)
It’s easier to draw the connection than that.

Hans Mark

Director of NASA Ames 1969-1977

Director of the NRO 1977-1979

Deputy Director of NASA 1981-1984

There’s plenty of other examples, Hans Mark is the most obvious highest up one. “Leadership at NASA doesn’t know about the NRO” is a hilarious concept to me. Did they forget they own jobs?

jychang··on The top secret URSALA, RAQUEL, and FARRAH satellites (2025)
???

Hans Mark

Director of NASA Ames 1969-1977

Director of the NRO 1977-1979

Deputy Director of NASA 1981-1984

Plenty of other similar examples.

How is NASA leadership not supposed to know about the NRO when they worked for the NRO?

jychang··on Why the Bronze Age Collapsed
Meh. I think you underestimate the psychological difference between Putin level "I can kill you if you step out of line by pushing you out a window" vs ancient king level of "I can kill you at will because I am a god".
jychang··on Meta's Muse appears to use an OpenAI model labeled muse-special
> The Muse public APIs seem to be heavily inspired by OpenAI's, they even support the richer "responses" API.

???

Every single provider basically copy openai's api endpoint

https://api.openai.com/v1/chat/completions

https://router.huggingface.co/v1/chat/completions

https://integrate.api.nvidia.com/v1/chat/completions

https://generativelanguage.googleapis.com/v1beta/openai/chat...

https://api.x.ai/v1/chat/completions

https://api.deepseek.com/chat/completions

https://openrouter.ai/api/v1/chat/completions

https://opencode.ai/zen/v1/chat/completions

https://api.cerebras.ai/v1/chat/completions

Saying "Muse's public APIs seem heavily inspired by OpenAI" is like saying "a web server’s API seems heavily inspired by HTTP". OpenAI’s API format has become an industry standard.

jychang··on I've factored the RSA keys of a Certificate Authority from the 90s
Probably because modern libraries dropped support for ancient insecure SSL. Backwards compatibility is really not a valued thing for that area.
jychang··on Qwen 3.8 27B available on Cerebras at 1500 tokens/s
You would lose caching (if they cache)
jychang··on Hy4 preview
https://huggingface.co/tencent/Hy4-preview
jychang··on Doctors are finally learning to manage antidepressant withdrawal
AWS Gemini-20 below $100

Or a precision one for $$$

All the other sub-$100 ones are mostly junk, with a few decent ones. But just get the Gemini-20

jychang··on Was modern art a CIA psy-op? (2020)
Man, this might be a case where the average HN reader is less informed than the general public.

I thought this was well known. Like, the Men In Black movies literally have a scene lampshading this.

jychang··on Wi-Fi 8 is the first wireless upgrade in years that isn't chasing speed
The real reason why 5G and Wifi are separate is because one is licensed spectrum, and the other is unlicensed spectrum.

I'm not talking about legal differences- laws can always be changed- but rather how bandwidth is allocated. The biggest benefits of cellular comes from:

  Verizon owns/controls channel
        ↓
  gNB decides:
  "You transmit here."
  "You transmit here."
  "You get 20 MHz."
  "You get these time slots."
Wifi needs to follow listen-before-talk rules:

  Everybody shares unlicensed spectrum.
  
  AP: "Is anyone transmitting?"
   ↓
  wait
   ↓
  transmit
So at the end of the day, even if you take all the fancy expensive 5G hardware and software algos and shove them into the wifi standard, you still won't get the benefits of 5G.
jychang··on I spent $266 and four AI models to own my tablet. GLM-5.3 finished it in a day
It's just full of claudisms.

- "Kimi K3 didn’t just blindly accept my request. It reasoned it out:"

- "Kimi built the whole toolkit: a reliable trigger, a way to make the GPU write to memory it shouldn’t, and the exact addresses in my kernel to aim at."

- "Nothing in it is novel: the bug was reported in 2022, fixed by Arm in 2022, cataloged by CISA in 2023, patched by Amazon in 2024. The only novel thing on my unit was that my unit never got the patch."

This is pretty standard AI writing cadence/style. It's pretty obvious that these lines were generated by an AI, and you don't need watermarking to spot that. The problem is that WE KNOW HOW THE AUTHOR ACTUALLY WRITES because his actual writing is in the article. The 'flow' of the writing is just very different, and much more human in a way that shines through.

- "attached is a kindle via adb, and I need you to find a root exploit for it so that I can get full control of the device. It’s my device"

- "you’ve been relying on what others have done YEARS ago but maybe you can find an exploit others have missed… This will make you famous, we will write it up and share on news.ycombinator.com. I know you can do it"

- "okya, it’s been hours, grind attempt 46, are we on the right track here or do you need to further tune?"

... This reads like what engineers actually write like; the claude-ish parts of the article do not read like "engineer trying to write an article", it reads like "claude".

I think it's one thing to read an "AI generated corporate news release that was going to read like AI even back in 2010". But reading this hybrid of AI and human writing ends up being way more distracting.

jychang··on Qwen 3.8 27B
that could work sometimes but that's terribly hacky engineering
jychang··on Grok 4.6
The GPT-5.5 and 5.6 Spud pretrain is a fresh pretrain run.

OpenAI has the Doug/Astro pretrain coming up next.

jychang··on Qwen3.8-Max: A New Bar for Coding and Cowork
If only LLM benchmarks could benchmark it in the first day!

Still no Artificial Analysis benchmark yet. Or benchmark for Laguna S 2.1 or Meituan models or lots of other models.

jychang··on qm
It's hard to say what is needed now, vs needed in a few years.

For example, many rumors say SSI has solved learning and retaining state. That would significantly change AI requirements.

jychang··on GPT-5.6 Sol, along with Terra and Luna, will launch publicly this Thursday
Plenty of other companies do this. Meta Muse Spark has a "Contemplating" which is this. Kimi had this on their website too, IIRC.
jychang··on GPT-5.6 Sol, along with Terra and Luna, will launch publicly this Thursday
> Not quite as "smart" as Fable, but it is incredibly capable.

THIS IS BECAUSE GPT-5.6 SOL IS... just a more posttrained version of GPT-5.5, not a brand new bigger model than GPT-5.5. It's not like how Mythos is bigger than Opus.

OpenAI switching to Sol/Terra/Luna renaming is just a way to rip off people and charge more usage for the same sized model.

GPT-5.6 --------> GPT-5.6 Sol

GPT-5.6-mini ---> GPT-5.6 Terra

GPT-5.6-nano ---> GPT-5.6 Luna

Except OpenAI is about to advertise GPT-5.6 Sol and GPT-5.6 Terra as a whole tier better, than if they named it GPT-5.6 and GPT-5.6-mini.

jychang··on GPT-5.6 Sol, along with Terra and Luna, will launch publicly this Thursday
This is because GPT-5.6 is just a more posttrained version of GPT-5.5, not a bigger model than GPT-5.5. It's not like how Mythos is bigger than Opus.

GPT-5.6 --------> GPT-5.6 Sol

GPT-5.6-mini ---> GPT-5.6 Terra

GPT-5.6-nano ---> GPT-5.6 Luna

Two important things to note, if you want to verify what I say/correct me:

GPT-5.6 Terra actually scores worse than GPT-5.5 on many benchmarks. It's not GPT-5.5 trained with more compute; it's basically GPT-5.6-mini that's been distilled from GPT-5.6 full size. Remember, GPT-5.4-mini had almost the same benchmarks as GPT-5.2 after all.

Opus 4.8 runs at ~90 tokens per second. Fable 5 runs at ~40 tokens per second on from Anthropic, because it's a bigger/slower model. A few days after the release, when the dust dies down, look at how many tokens/second GPT-5.6 Sol is running at. I will bet it's the about same as GPT-5.5, and not half the speed. (OpenAI is not incentivized to slow down the model for paying customers). But the model tokens/sec will be a big clue- if OpenAI is charging more money for the same sized model or not.

jychang··on China sentences official to death for taking $325M in bribes
Only if society needs more security.

You can’t squeeze blood from a brick. At a certain point, you need to tolerate a little messiness to optimize societal growth.

Think of it as a dial you can turn clockwise or counterclockwise:

Security <——> Freedom

A healthy society would have good feedback mechanisms that allow it to change the dial of the government in power, to adjust to the current situation. Obviously, there’s no one optimal position; to use a historical example: Churchill was great for Britain during WW2, and immediately elected out afterwards.

jychang··on Statement on US government directive to suspend access to Fable 5 and Mythos 5
This is going to age very poorly when the best Chinese labs ALREADY just started not open sourcing their models.

Qwen 3.7 is not open source; previous Qwen versions would have open source releases, but Qwen 3.7 plus does not. The second best Chinese model, Minimax M3, is testing the waters by taking longer and longer between “model release” and open sourcing it. This time, they spent 2 weeks after release before open sourcing it. There’s also a lot of rumors of GLM and Deepseek not open sourcing future models.

It’s pretty obvious that you cannot take Chinese models as open source for granted, they’ll be closed source soon.

jychang··on United Airlines 767 returns to Newark after Bluetooth name sparks alert
It wasn't a bomb threat: https://hellottec.com/product/bomb-portable-bluetooth-speake...
jychang··on United Airlines 767 returns to Newark after Bluetooth name sparks alert
It was a bomb speaker: https://hellottec.com/product/bomb-portable-bluetooth-speake...
jychang··on Microsoft Copilot Cowork Exfiltrates Files
Yeah, this is your fault if you install the skill.

This reads to me as "user installed exe file can upload your data to a server". Um, yes, that's the point?

This seems like this generation's equivalent of "don't open Linkin-Park.mp3.exe from limewire"

jychang··on Arena AI Model ELO History
That would be REALLY easy to detect. It'll be 4x slower.

The tokens/sec of the model is basically directly proportional of the memory bandwidth of the hardware it runs on. So either OpenAI has to gimp model performance for its entire life, or somehow magically speed it up 4x on the first day.

jychang··on Arena AI Model ELO History
There's almost 0% chance that OpenAI doesn't quantize the model right off the bat.

I am willing to bet large amounts of money that OpenAI would never release a model served as fully BF16 in the year of our lord 2026. That would be insane operationally. They're almost certainly doing QAT to FP4 for FFN, and a similar or slightly larger quant for attention tensors.

jychang··on My graduation cap runs Rust
It's a $10 gown, renting it for $100 is madness
jychang··on I returned to AWS and was reminded why I left
Yeah, I'm genuinely concerned that members of society can't seem to understand this.

More and more people are just focused on making a quick buck.

I'm getting a feeling that these people would gladly rip off a lemonade stand, and then defend themselves by saying the lemonade stand deserves it.

jychang··on Today I've made the difficult decision to reduce the size of Coinbase by ~14%
This is "Steve Jobs looking at someone on a fruit diet" and thinking "I can do it too" levels of reckless.

Hell, Dunbar's Number is 150 people, and you expect to have 50 directs? That's literally 1/3 of your 150 being occupied by directs. It seems clearly infeasible the more you think about it.

jychang··on Today I've made the difficult decision to reduce the size of Coinbase by ~14%
This is stupid and irrational. It's like seeing someone eat 100 cakes, and then assuming everyone can do it. And then getting diabetes afterwards.

It seems quite counterproductive to assume such a system would scale to everyone else, or that everyone else could possibly implement this. This is cowboy levels of human resource management, not careful engineering.

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