either way - say that they have about 10M A100 hours. if they use half their budget for the biggest model as FB did with Llama (rest on testing / smaller models as they scale), then they'll budget 5M A100 hours for the biggest model, or 3x llama-2's 1.7M A100 hours (2k A100 for 21 days).
However, why wouldn't Llama-3 also be 3x bigger than Llama-2? FB's H100's are coming online; they apparently have 4k H100 in a cluster (https://www.nextplatform.com/2023/09/26/meta-platforms-is-de...), and each H100 is about 3x the speed of an A100 (https://www.mosaicml.com/blog/coreweave-nvidia-h100-part-1). So if they provided the same 'calendar time' of 21 days over a single cluster of 4096 H100, that would be about 6.2M A100 hours for a 70B model.
there is an entirely separate question of, LLM's are functions of compute _and_ data, will they also find enough high quality _and_ kosher tokens in their low resource languages?