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DeepSeek says V4.1-Flash keeps 890 bytes of KV per token. vLLM allocates 1,056. Reconcile the two numbers.

Forty layers, and only four of them own a global KV cache. The answer counts what those four store, finds the one dtype choice and the page padding that separate the model card from the engine, and says which number to plan capacity on.

Updated Oct 2026 · Worked answers on inference mechanisms, with calculations, implementation details, and follow-up questions.

Forty layers, and only four of them own a global KV cache. The answer counts what those four store, finds the one dtype choice and the page padding that separate the model card from the engine, and says which number to plan capacity on.

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