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Comment by yjftsjthsd-h | Hacker News Reader

Wait, how did it `sleep 3`? I thought LLMs didn't have a concept of time

It’s still rendering frames constantly, no? So it just figures the next X frames are all doing nothing?

Normal only keypresses invoke the next ”frame”. There is a sleep token that the runner could use to indicate that time is moving.

Try pause for 3 seconds in your favourite harness

from the post:

Time is an input too. If nothing is pressed, the model gets a WAIT token with a duration instead of a key, which is how snake keeps moving on its own.

That seems as likely as anything, but that just moves the problem to counting, doesn't it? The model gets the duration, but I was under the impression LLMs struggled with the arithmetic that would make that useful.

Idk about Qwen 2.5 Coder that this is based on, but modern models don't struggle with arithmetic. I see Qwen 3.8 do long-hand math in thinking traces (ie. it outputs 17+35+12=64 in the thinking trace) so I would imagine this is something they train into the model specifically. Sometimes it creates and runs a simple python script to check its work.

It's still strange to me that an ability to perform arithmetic (and not just memorize a giant table of results) could emerge from training on language.

In principle a large enough neural network can provably approximate any continuous function. Since arithmetic can be represented with a concrete grammar, it's not surprising to me that an LLM could contain an abstract representation if trained correctly.

These things are still strange to everyone. The fact matrixes of numbers can seemingly conceptualize almost anything is just freaking weird.

Of course there may be an electronic civilization out there that would say the same things about our mushy brains... "They are made out of meat!"

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