MoE 101 – Episode 4: Theoretical: 60% fewer FLOPs. Reality: 7x slow down
You followed all the tips from our last video. Your MoE model finally trains…

Then you try to scale it on GPUs…and… memory issues ❌, underused experts ❌, unpredictable compute bottlenecks ❌.

From… pic.twitter.com/b812dujd6S

— Cerebras (@cerebras) 4 septembre 2025

MoE 101 – Episode 4: Theoretical: 60% fewer FLOPs. Reality: 7x slow down You followed all the tips from our last video. Your MoE model finally trains… Then you try to scale it on GPUs…and… memory issues , underused experts , unpredictable compute bottlenecks . From

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