Behaviorally fingerprinting Ox Alpha's provenance

nijave•about 3 hours ago

Error messages matching Z.ai GLM I think are the simplest/most compelling. I had Opus 4.8 poke it and it came back with a couple different errors than the article mentions.

Matching the tokenizer is interesting tho

randomblock1•20 minutes ago

I find the tokenizers most compelling. That's what the model is trained on, it's an immutable fact of the model and its architecture. You know for a fact that the model is at least related to other models that way. And if a tokenizer is unique / specific to one lab, like GLM's is, it's basically as good as it gets.

Comparatively, you can't be 100% sure that Z.ai isn't able to host some other lab's model (although in this case, the hosting errors still support the GLM theory).

dang•about 4 hours ago

Recent and related:

Ox-Alpha Is GLM? - https://news.ycombinator.com/item?id=49422226 - Aug 2026 (65 comments)

A mysterious free AI model is impressing developers. Nobody knows who made it - https://news.ycombinator.com/item?id=49406289 - Aug 2026 (4 comments)

Ox Alpha - https://news.ycombinator.com/item?id=49381896 - Aug 2026 (202 comments)

johndough•about 3 hours ago

Another strong hint is that the uptime graph of GLM-5.3 by Z.ai is very similar to that of Ox Alpha:

https://openrouter.ai/stealth/ox-alpha#uptime

https://openrouter.ai/z-ai/glm-5.3#uptime

Screenshot of a recent blip: https://files.catbox.moe/haq90y.png

hypfer•about 3 hours ago

Can someone explain why people care about that?

Both as in "Why is there a stealth launch like that in the first place?" but also "Why does it matter? Is it very good in something?"

Philpax•about 3 hours ago

Stealth launch: builds hype, allows them to collect user preference data and see where the model fails. Why people care: it's free, decent, and people love a good mystery.

hypfer•about 3 hours ago

Aaah, free inference. Yeah that checks out and fits very well with weird Internet hype.

Okay, fair enough. Thanks!

chermi•about 2 hours ago

I think there was some loud speculation is was Google. It's cool people can pretty definitively show it's not. But also maybe Google is being crazy sneaky and faking it! (Joking)

tcdent•about 2 hours ago

I think the stranger thing is that people spend tens of hours doing analysis like this to hit an inevitably-expiring hype cycle that will give us a definitive answer shortly.

chermi•about 2 hours ago

Don't you think the forensics is fun?! This is exactly the sort of thing i would've expected hn to be broadly interesting to hn. It's a complicated technology and people are poking it and learning things

cgorlla•about 2 hours ago

It's fun! Also it's an interesting commentary on where the AI industry is as a whole.

cgorlla•about 2 hours ago

It's decent. How good depends on compute needs.

UncleOxidant•about 3 hours ago

Speculation that this is GLM 5.3 Flash.

cgorlla•about 2 hours ago

Very likely, NYT confirmed it's releasing Friday.

Behaviorally fingerprinting Ox Alpha's provenance

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