Llama 3.1 and Llama 4 Architecture Notes for Engineers (ANSWERED)
TL;DR — Quick Answer
Larger context in 3.1, improved multilingual and coding, Llama 4 introduces MoE variants for efficiency — impacts GPU sizing, routing for MoE, and eval before replacing 3.1 in prod.
The Interview Question
Summarize architectural improvements in Llama 3.1/4 relevant to deployment and fine-tuning decisions.
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