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Plan a 7B pretrain from scratch on 64 H100s in 30 days, end to end.

64 H100s for 30 days is a real budget with a real token count. The answer sizes the run from Chinchilla, picks parallelism for this exact cluster, and has a concrete plan for loss spikes and silent data corruption.

Updated Sep 2026 · Grounded in real Forward Deployed Engineer interview loops and written to a senior-engineer editorial bar.

64 H100s for 30 days is a real budget with a real token count. The answer sizes the run from Chinchilla, picks parallelism for this exact cluster, and has a concrete plan for loss spikes and silent data corruption.

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