hardGroqCerebras

Why are Groq and Cerebras so fast at batch 1, and what does that speed cost at scale?

Follow a dependent read path to understand SRAM locality, aggregate bandwidth and the difference between one fast stream and total serving throughput.

Updated Oct 2026 · Learn how AI infrastructure works through explanations, worked examples and diagrams, then practise applying it to interview questions.

Follow a dependent read path to understand SRAM locality, aggregate bandwidth and the difference between one fast stream and total serving throughput.

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Work through the numbers

Change the assumptions in a free calculator, then explain what the result establishes and what still needs measurement.

The concepts behind this question

Use these concept explanations to review the ideas behind this question.

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🧩 GPU & Accelerator Architecture🔒 Premium

Cerebras, Groq and Dataflow AcceleratorsDataflow accelerators organize computation and memory differently from GPUs. On-chip storage can help latency, but capacity, communication and batching determine the wider tradeoff.

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🧮 Napkin Math & Capacity🔒 Premium

Cost per Million TokensCost per million tokens connects fleet spending to useful output. Keep the time window, token definition and utilization assumptions consistent when comparing deployments.

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🚀 Inference & Serving🔒 Premium

Reasoning Budgets and Answer LatencyReasoning tokens consume generation time and retained state before an answer becomes usable. Separate the first generated token from the first answer token, reserve output capacity, and evaluate reasoning limits against task success.

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🚀 Inference & Serving🔒 Premium

Reranking and Retrieval BudgetsA reranker spends extra computation on retrieved candidates. Count query-document pairs, protect permission boundaries and measure whether better evidence justifies its added queueing and latency.

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FEDITOR'S NOTE

Follow the dependent layer sequence before adding bandwidth across devices. Distinguish one stream’s latency from the useful throughput of a busy service.

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