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Okay, so get this.

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AI that thinks in ideas, not just words, but actual ideas.

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Yeah, it's a pretty big shift.

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Right, like totally different from how we usually think

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about language AI.

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Definitely.

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So this paper you sent in, large concept models,

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language modeling in a sentence representation space.

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It basically says, forget the old way of doing things,

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we're going concept driven.

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It's exciting, trying to like get closer

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to how we think, you know?

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Oh yeah, for sure.

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Like our brains don't think word by word, right?

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It's more like-

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Oncepts, exactly.

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Think about when you're writing something,

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planning a speech.

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Totally, you're not just like stringing words together,

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there's a bigger picture.

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You've got these ideas you want to get across.

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Okay, I'm with you.

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But how do they actually teach an AI to do that?

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What are these, what did you call them, large concept models?

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It's LCMs.

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Right, LCMs, what's the deal with those?

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Think of it like this, the language AI we have now,

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like the stuff behind chat JPD.

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They're good at guessing the next word.

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Like statistically what word comes next.

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Right, right.

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But LCMs, they're trying to predict the next concept.

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And the way they do that is with something

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called sentence embeddings.

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Sentence embeddings, so like taking a whole sentence

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and squishing it down into a code.

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Yeah, basically like a fingerprint of the idea

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behind the whole sentence.

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And the really cool part is this paper uses a system

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called Sonar.

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And Sonar can make these embeddings for like

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over 200 languages, even speech.

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Hold on, 200 languages.

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So you're saying this AI could like listen to me

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talk in English and then I don't know,

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translate the ideas into French.

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But without actually translating word for word.

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Yeah, that's the goal, it's still early, but.

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That's wild.

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Okay, but back up a sec.

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How do these LCMs actually work?

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Like step by step.

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All right, so imagine you feed some text into the AI.

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First thing it does, splits that text into sentences.

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Gotcha, like breaking a book into chapters.

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Yeah, good analogy.

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Then each sentence, it gets turned into this concept vector.

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That's where the sentence embeddings come in.

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Okay, so each sentence is like a little package

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of meaning, this concept vector.

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Right, and then the LCM comes in,

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it takes those concept vectors

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and it tries to predict what the next one should be.

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So it's not just the next word,

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it's figuring out the next idea.

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Exactly, it's about the flow of ideas, not just words.

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So you're getting the logic behind a story

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and argument, whatever.

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It's just like moving past just grammar

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and getting into, ah.

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Semantics.

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Yeah, semantics.

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Yeah.

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And once it's predicted the next concept,

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it uses sonar again to turn that vector back

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into a sentence we can read.

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So it's like text to concept, predict next concept,

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concept back to text.

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Pretty neat, but I'm guessing it's not that easy, right?

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You got it.

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Language is messy.

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Oh yeah.

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Like there could be tons of ways to continue a sentence,

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lots of different meanings.

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Right, right.

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So how does the LCM deal with that?

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Does it just pick like the most statistically likely

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next concept?

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They do something more interesting than just statistics.

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They have these things called diffusion-based LCMs.

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And these diffusion-based LCMs,

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they use this process of noising and denoising.

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Imagine you take a picture, like a photograph,

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and you add a bunch of static to it.

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Like on an old TV.

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Yeah, exactly.

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And then they train the LCM to like remove that static

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and get back the original picture.

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And by doing that over and over,

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the LCM learns to see through the noise,

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to get the structure, even with all that mess.

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So like training the AI to see the core meaning,

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even if it's hidden.

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Exactly.

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And there are two main types of these diffusion-based things.

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One tower and two tower.

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One tower, two tower.

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Why the different names?

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It's all about their architecture,

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like how they're built inside.

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One tower, everything happens in one structure,

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like a one-stop shop.

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OK.

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But two-tower models, they split it up.

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One tower for encoding the input into concepts,

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and another tower for predicting and decoding the next one.

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Huh.

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So it's like dividing the labor?

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Yeah.

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Each tower is a specialist.

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Yeah.

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And what they found is this two-tower setup,

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it seems to work really well for language,

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especially for generating text that makes sense, you know,

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is coherent.

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Like it consistently outperforms the others.

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Makes sense, right?

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Like a team of exploits.

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Exactly.

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But there's another type of LCM they looked at too.

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It's called a quantized LCM.

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Quantized.

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That sounds complicated.

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Well, it's about dealing with how huge the concept space is.

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Imagine all the possible concepts, right?

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Like every idea ever.

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OK.

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That's a lot.

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So quantized LCMs, they try to simplify that

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by like breaking it down into chunks.

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So instead of infinite concepts, it's more like a grid.

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Yeah, exactly.

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It makes it easier to learn.

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And they have two kinds of these,

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quant LCMD and quant LCMC, which do this chunking

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a little differently.

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OK, so we've got the basic LCM, the diffusion-based ones

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with their towers, and these quantized ones.

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That's a lot of options.

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How do they know which ones best?

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That's where the experiments come in.

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They do what's called ablation studies.

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Basically, they test them all out head to head.

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So like an AI bake off.

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Yeah.

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And what they found is those diffusion-based LCMs,

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especially the two-tower ones, they do really well.

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So two towers the winner so far.

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What else did they learn from these tests?

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One interesting thing was about tuning the noise schedule.

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Noise schedule.

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Remind me what that was again.

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Remember that whole noising into noising thing?

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The noise schedule is like, how much noise you add and when?

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It's like how much static you put on the TV picture.

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Yep.

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And by adjusting that, they can actually

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control how well the LCM predicts the next concept

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and also how diverse the output is.

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Oh, that's cool.

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So like finding the balance between sticking to the script

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and being creator.

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Right, exactly.

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And another thing they found, this was interesting,

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this idea of fragility in the sonar space.

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Fragility.

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So it turns out that some sentence embeddings,

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they're really sensitive to changes.

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Like you change one tiny thing and the meaning's

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totally different.

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Oh, like that telephone game.

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Exactly.

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And that's a big deal for training these LCMs.

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Because if the foundation's shaky,

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the whole thing could fall apart.

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So it's not just about the LCM itself.

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It's got to have good, solid concepts to work with.

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Right.

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If the sentence embeddings are messed up,

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the whole thing's messed up.

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OK.

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So we've been talking about these kind of smaller models.

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Yeah.

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But I have a feeling they didn't stop there, right?

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You know it.

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They went big.

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They built a 7 billion parameter two tower LCM.

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Whoa, 7 billion.

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That's massive.

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What could you even do with a model that big?

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Well, they tried out some tougher tasks,

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like text summarization.

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You know, taking a long piece of text

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and boiling it down to the main points.

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And they even did this new thing called summary expansion.

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So you take a short summary and you

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generate a longer text from it, like fleshing out an outline.

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Wow.

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So not just thinking in concepts,

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but also doing these complex tasks.

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Yeah.

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Did it work?

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Like was this mega LCM any good?

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They used a bunch of different metrics to check it out.

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And yeah, it's impressive.

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Even at that scale, LCMs were holding their own

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against the usual large language models,

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sometimes even beating them.

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That's incredible.

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But wait, there's more, right?

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You mentioned something about multilingual magic.

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Yeah, this is where it gets really cool.

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Because these LCMs are working with concepts,

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they can potentially handle any language that's

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so in our supports and get this, without extra training.

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Hold up.

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You mean I could train an LCM on English text.

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And it could understand, I don't know, Japanese

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without ever seeing Japanese before.

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That's the idea.

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It's learning the concepts, not just the words.

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My mind is blown.

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Did they actually test this out?

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Oh, yeah.

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They did a test on this multilingual data set called

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XL Sum.

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And the LCM, it beat a really powerful language model,

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Lama 3.18BIT, on 42 different languages, many of which

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it had never seen before.

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No way.

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It's pretty amazing.

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This Zeryshot multilingual thing,

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it's a total game changer.

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And this is huge.

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It sounds almost too good to be true.

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I know.

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It's still early.

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But think about it.

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Communication, collaboration, understanding.

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No more language barriers.

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Exactly.

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And they even go one step further in the taper.

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They start talking about giving LCMs a plan to follow,

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like an outline.

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So instead of just predicting whatever concept comes next,

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it's got a roadmap.

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Right.

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They call them break concepts and plan concepts

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to help structure things.

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So break concepts are like chapter breaks in a book.

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And plan concepts tell you what should be in each section.

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They even tried it out with what they call a large planning

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concept model, or LPCM.

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And it looks really good.

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The text it generated was way more coherent.

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So these LCMs, they can think in concepts,

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they can do multiple languages, and now they

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can follow a plan.

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This is revolutionary.

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It's pushing the boundaries, for sure.

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We're getting closer to AI that can actually think like us.

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This is mind blowing.

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But OK, before we get too carried away,

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we've got to talk about the limitations too.

275
00:08:49,800 --> 00:08:51,480
I mean, no AI is perfect, right?

276
00:08:51,480 --> 00:08:52,360
Definitely not.

277
00:08:52,360 --> 00:08:53,920
And the paper is honest about that.

278
00:08:53,920 --> 00:08:54,800
Good.

279
00:08:54,800 --> 00:08:56,960
So that's what we'll do in the next part of this deep dive.

280
00:08:56,960 --> 00:08:57,760
Stick around.

281
00:08:57,760 --> 00:08:58,960
We've got more to uncover.

282
00:08:58,960 --> 00:09:01,000
Back again, ready to talk limitations.

283
00:09:01,000 --> 00:09:01,720
Let's do it.

284
00:09:01,720 --> 00:09:05,440
It all sounds amazing, but no AI is perfect.

285
00:09:05,440 --> 00:09:05,960
Right.

286
00:09:05,960 --> 00:09:07,160
The paper's upfront about that.

287
00:09:07,160 --> 00:09:08,680
There's still a lot to figure out.

288
00:09:08,680 --> 00:09:09,160
Yeah.

289
00:09:09,160 --> 00:09:09,680
Yeah.

290
00:09:09,680 --> 00:09:11,000
I mean, concepts themselves, they're

291
00:09:11,000 --> 00:09:11,880
kind of fuzzy, right?

292
00:09:11,880 --> 00:09:13,040
Mm-hmm.

293
00:09:13,040 --> 00:09:16,920
How do you even define a concept for an AI?

294
00:09:16,920 --> 00:09:18,560
That's the million dollar question.

295
00:09:18,560 --> 00:09:20,680
How do you really capture what a concept is?

296
00:09:20,680 --> 00:09:23,800
And that ties into, remember that whole fragility thing

297
00:09:23,800 --> 00:09:24,520
we were talking about?

298
00:09:24,520 --> 00:09:26,640
Oh, yeah, with the sentence embeddings.

299
00:09:26,640 --> 00:09:29,640
Like, a tiny change can totally mess up the meaning.

300
00:09:29,640 --> 00:09:30,480
Exactly.

301
00:09:30,480 --> 00:09:32,280
So when you're talking about concepts,

302
00:09:32,280 --> 00:09:34,680
that fragility is a big deal.

303
00:09:34,680 --> 00:09:37,040
Imagine the AI trying to understand something

304
00:09:37,040 --> 00:09:40,480
complex, democracy, justice, these big ideas.

305
00:09:40,480 --> 00:09:42,920
If the sentence embedding for those is off,

306
00:09:42,920 --> 00:09:44,200
even by a little bit.

307
00:09:44,200 --> 00:09:45,240
The whole thing's messed up.

308
00:09:45,240 --> 00:09:45,840
Yeah.

309
00:09:45,840 --> 00:09:47,760
It's like you're building on a shaky foundation.

310
00:09:47,760 --> 00:09:49,360
Doesn't matter how fancy the rest of it is.

311
00:09:49,360 --> 00:09:49,880
Right, right.

312
00:09:49,880 --> 00:09:52,360
So you've got to make sure those concept vectors are, like,

313
00:09:52,360 --> 00:09:54,520
really solid, accurate.

314
00:09:54,520 --> 00:09:55,320
Absolutely.

315
00:09:55,320 --> 00:09:57,280
And that kind of leads into another limitation,

316
00:09:57,280 --> 00:10:00,160
the computing power, encoding all these sentences

317
00:10:00,160 --> 00:10:03,360
into concept vectors, and then decoding them back.

318
00:10:03,360 --> 00:10:03,800
Oh, yeah.

319
00:10:03,800 --> 00:10:05,240
I bet that takes a lot of juice.

320
00:10:05,240 --> 00:10:07,640
It's a lot, especially with these huge data sets.

321
00:10:07,640 --> 00:10:09,560
It's like a whole extra layer on top

322
00:10:09,560 --> 00:10:11,200
of regular language processing.

323
00:10:11,200 --> 00:10:12,320
So it's a trade-off, right?

324
00:10:12,320 --> 00:10:14,120
You want the AI to think big, but it's

325
00:10:14,120 --> 00:10:16,000
got to be able to handle it computationally.

326
00:10:16,000 --> 00:10:16,560
Totally.

327
00:10:16,560 --> 00:10:18,200
And then there's the data itself.

328
00:10:18,200 --> 00:10:21,480
Like, LCMs still need to learn from tons of text, right?

329
00:10:21,480 --> 00:10:22,200
For sure.

330
00:10:22,200 --> 00:10:25,840
And if that data is bad, biased, or just limited.

331
00:10:25,840 --> 00:10:26,920
Garbage in, garbage out.

332
00:10:26,920 --> 00:10:27,840
Exactly.

333
00:10:27,840 --> 00:10:30,760
So finding good data, that's a huge challenge,

334
00:10:30,760 --> 00:10:32,920
especially for all those languages.

335
00:10:32,920 --> 00:10:35,400
200 plus, that's sonar can handle.

336
00:10:35,400 --> 00:10:37,520
It's got to be high quality, diverse,

337
00:10:37,520 --> 00:10:40,160
and represent all those different ways people use language.

338
00:10:40,160 --> 00:10:41,120
That's a tall order.

339
00:10:41,120 --> 00:10:41,680
Yeah.

340
00:10:41,680 --> 00:10:43,880
OK, so we've got the abstractness of concepts,

341
00:10:43,880 --> 00:10:47,040
the computing power issue, and the data problem.

342
00:10:47,040 --> 00:10:47,760
Anything else?

343
00:10:47,760 --> 00:10:50,480
Well, there's also the question of how

344
00:10:50,480 --> 00:10:51,760
you evaluate these things.

345
00:10:51,760 --> 00:10:54,400
Like, how do we know if an LCM is doing a good job?

346
00:10:54,400 --> 00:10:54,760
Right.

347
00:10:54,760 --> 00:10:56,800
It's not just about predicting the next word anymore.

348
00:10:56,800 --> 00:10:57,600
Exactly.

349
00:10:57,600 --> 00:11:01,840
We need ways to measure how well it understands ideas,

350
00:11:01,840 --> 00:11:04,600
how well it can think conceptually.

351
00:11:04,600 --> 00:11:05,400
That's tricky.

352
00:11:05,400 --> 00:11:06,200
Yeah.

353
00:11:06,200 --> 00:11:08,360
So we need new metrics, metrics that

354
00:11:08,360 --> 00:11:11,000
make sense to humans that capture what we think of

355
00:11:11,000 --> 00:11:12,680
as conceptual understanding.

356
00:11:12,680 --> 00:11:14,160
Like, you can't judge a painting just

357
00:11:14,160 --> 00:11:15,640
by looking at the breast drugs.

358
00:11:15,640 --> 00:11:16,680
Perfect analogy.

359
00:11:16,680 --> 00:11:17,680
There's more to it than that.

360
00:11:17,680 --> 00:11:19,440
We need to see the whole picture, you know?

361
00:11:19,440 --> 00:11:22,200
OK, so limitations.check.

362
00:11:22,200 --> 00:11:24,640
But we can't forget about the potential here.

363
00:11:24,640 --> 00:11:27,440
I mean, this is AI that could change everything.

364
00:11:27,440 --> 00:11:31,720
Communication, understanding, the way we learn, create,

365
00:11:31,720 --> 00:11:32,680
even solve problems.

366
00:11:32,680 --> 00:11:34,120
I know, right.

367
00:11:34,120 --> 00:11:34,960
It's mind blowing.

368
00:11:34,960 --> 00:11:37,600
This paper, it just opens up so many doors.

369
00:11:37,600 --> 00:11:38,040
It does.

370
00:11:38,040 --> 00:11:40,520
Even with the challenges, this feels like a huge step forward.

371
00:11:40,520 --> 00:11:41,360
Absolutely.

372
00:11:41,360 --> 00:11:44,720
Like, we're getting closer to AI that's truly intelligent.

373
00:11:44,720 --> 00:11:46,840
So in the last part of this deep dive,

374
00:11:46,840 --> 00:11:48,480
we'll explore some of those possibilities.

375
00:11:48,480 --> 00:11:50,280
Get ready for a glimpse into the future.

376
00:11:50,280 --> 00:11:51,440
All right, final part.

377
00:11:51,440 --> 00:11:52,560
The future.

378
00:11:52,560 --> 00:11:53,440
Let's get into it.

379
00:11:53,440 --> 00:11:54,400
The big picture, right?

380
00:11:54,400 --> 00:11:55,000
Yeah.

381
00:11:55,000 --> 00:11:56,600
I want to hear about all those possibilities.

382
00:11:56,600 --> 00:11:58,680
We've talked about how it works, the challenges.

383
00:11:58,680 --> 00:11:59,000
Yeah.

384
00:11:59,000 --> 00:12:01,640
Now let's, like, unleash our imaginations.

385
00:12:01,640 --> 00:12:06,240
Imagine a world where language isn't a barrier anymore.

386
00:12:06,240 --> 00:12:09,760
Where AI can translate, understand, but not just words,

387
00:12:09,760 --> 00:12:13,800
the ideas across, like, all these different languages.

388
00:12:13,800 --> 00:12:14,400
That's powerful.

389
00:12:14,400 --> 00:12:15,920
No more struggling with translations

390
00:12:15,920 --> 00:12:17,840
or trying to figure out what someone really means.

391
00:12:17,840 --> 00:12:20,600
Just clear communication.

392
00:12:20,600 --> 00:12:22,080
Global collaboration.

393
00:12:22,080 --> 00:12:23,360
And it's not just language, right?

394
00:12:23,360 --> 00:12:24,640
Because it's all about concepts.

395
00:12:24,640 --> 00:12:26,640
These LCMs could work with other stuff, too.

396
00:12:26,640 --> 00:12:29,720
Images, music, even, like, scientific data.

397
00:12:29,720 --> 00:12:30,400
Wait, hold on.

398
00:12:30,400 --> 00:12:34,040
You're saying an AI could get the meaning behind a photo

399
00:12:34,040 --> 00:12:36,040
or, like, the emotions in a song.

400
00:12:36,040 --> 00:12:39,080
That's the idea, bridging those gaps between how we express

401
00:12:39,080 --> 00:12:41,160
ourselves and how we understand things.

402
00:12:41,160 --> 00:12:44,640
So, like, an AI could read a scientific paper,

403
00:12:44,640 --> 00:12:47,360
get the key points, and then, I don't know,

404
00:12:47,360 --> 00:12:48,680
make a chart of the data.

405
00:12:48,680 --> 00:12:48,920
Yeah.

406
00:12:48,920 --> 00:12:50,560
And explain it all in simple language.

407
00:12:50,560 --> 00:12:51,400
Exactly.

408
00:12:51,400 --> 00:12:54,440
Think about how useful that would be for research,

409
00:12:54,440 --> 00:12:55,400
for learning.

410
00:12:55,400 --> 00:12:57,120
So many possibilities.

411
00:12:57,120 --> 00:12:59,640
It's like having this super smart assistant

412
00:12:59,640 --> 00:13:01,720
that can process any kind of information

413
00:13:01,720 --> 00:13:02,840
and tailor it to you.

414
00:13:02,840 --> 00:13:04,160
Personalized learning.

415
00:13:04,160 --> 00:13:04,920
Imagine that.

416
00:13:04,920 --> 00:13:08,080
An AI tutor that knows exactly how you learn best.

417
00:13:08,080 --> 00:13:09,200
OK, that's amazing.

418
00:13:09,200 --> 00:13:11,040
But what about, like, creative stuff?

419
00:13:11,040 --> 00:13:14,600
Could these LCMs help you write a story or compose music,

420
00:13:14,600 --> 00:13:16,000
design new products even?

421
00:13:16,000 --> 00:13:16,640
I think so.

422
00:13:16,640 --> 00:13:18,080
Because you're working with concepts,

423
00:13:18,080 --> 00:13:20,520
it's, like, breaking free from how we create now.

424
00:13:20,520 --> 00:13:23,560
You could explore new ideas, combine them in different ways.

425
00:13:23,560 --> 00:13:24,800
Push those boundaries.

426
00:13:24,800 --> 00:13:25,600
Exactly.

427
00:13:25,600 --> 00:13:27,960
It's like having a brainstorming partner, one that never

428
00:13:27,960 --> 00:13:29,120
runs out of ideas.

429
00:13:29,120 --> 00:13:30,160
That would be awesome.

430
00:13:30,160 --> 00:13:34,040
But OK, zooming out even more, what about the impact on,

431
00:13:34,040 --> 00:13:36,240
like, society as a whole?

432
00:13:36,240 --> 00:13:38,760
Could these LCMs help us solve big problems?

433
00:13:38,760 --> 00:13:40,400
That's the big question, right?

434
00:13:40,400 --> 00:13:42,840
What if they could analyze all that data

435
00:13:42,840 --> 00:13:46,720
we have on climate change, poverty, whatever,

436
00:13:46,720 --> 00:13:49,320
and come up with solutions that we haven't even thought of?

437
00:13:49,320 --> 00:13:51,720
It's like a global brain working on all these problems.

438
00:13:51,720 --> 00:13:53,600
It's exciting, but we've got to be careful, too.

439
00:13:53,600 --> 00:13:55,360
Like, with any powerful technology,

440
00:13:55,360 --> 00:13:57,200
there are ethical things to think about.

441
00:13:57,200 --> 00:13:59,600
We need to make sure these LCMs are used for good.

442
00:13:59,600 --> 00:14:01,200
Right, for good.

443
00:14:01,200 --> 00:14:03,840
But still, this is pretty amazing stuff.

444
00:14:03,840 --> 00:14:06,520
This whole concept of conceptual AI, it's

445
00:14:06,520 --> 00:14:07,400
It's a game changer.

446
00:14:07,400 --> 00:14:08,080
It is.

447
00:14:08,080 --> 00:14:09,880
This paper, it's really opened my eyes.

448
00:14:09,880 --> 00:14:11,480
Thanks for taking this deep dive with me.

449
00:14:11,480 --> 00:14:12,600
It's been a pleasure.

450
00:14:12,600 --> 00:14:14,240
This research, it's mind-blowing.

451
00:14:14,240 --> 00:14:15,480
And we're just at the beginning.

452
00:14:15,480 --> 00:14:16,720
That's what's so cool about it, right?

453
00:14:16,720 --> 00:14:18,960
Who knows what the future holds?

454
00:14:18,960 --> 00:14:20,600
All right, that wraps up our deep dive

455
00:14:20,600 --> 00:14:22,240
into large concept models.

456
00:14:22,240 --> 00:14:25,200
Until next time, everyone, keep those brains buzzing.

457
00:14:25,200 --> 00:14:27,800
And if you find any cool AI research out there.

458
00:14:27,800 --> 00:14:28,800
Send it our way.

459
00:14:28,800 --> 00:14:56,360
We'll be here ready for the next deep dive.

