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Comment by HarHarVeryFunny

3 months ago

Yeah.

Karpathy recently referred to LLMs having more "working memory" than a human, apparently referring to these unchanging internal activations as "memory", but it's an odd sort of "working memory" if you can't actually update it to reflect progress on what you are working on, or update per new information (new unexpected token having been sampled).

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HarHarVeryFunny

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sailingparrot  3 months ago

I think a better mental framework of how those model work is that they keep an history of the state of their "memory" across time.

Where humans have a single evolving state of our memory LLMs have access to all the states of their "memories" across time, and while past state can't be changed, the new state can: This is the current token's hidden state, and to form this new state they look both at the history of previous states as well as the new information (last token having been sample, or external token from RAG or whatnot appended to the context).

This is how progress is stored.

  • HarHarVeryFunny  3 months ago

    Thanks, that's a useful way to think about it.

    Presumably the internal state at any given token position must also be encoding information specific to that position, as well as this evolving/current memory... So, can this be seen in the internal embeddings - are they composed of a position-dependent part that changes a lot between positions, and an evolving memory part that is largely similar between positions only changing slowly?

    Are there any papers or talks discussing this ?