Mixture of Experts Explained: How the Smartest AI Models Use Less Than 5% of Their “Brain”
December 3, 2025
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0:35Now PlayingMixture of Experts Explained: How the Smartest AI Models Use Less Than 5% of Their “Brain”
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as posted by the channel"The world’s most advanced open-source AI models don’t fire all their parameters at once. Instead, they use a technique called Mixture of Experts (MoE)—activating only the specific “experts” needed for each task.
A tiny router decides which expert regions to use, meaning less than 5% of the model activates per token. These experts run in parallel across many GPUs and share their results to generate a final answer.
But MoEs only scale efficiently if all those experts can communicate instantly."
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