Anthropic says its AI moved Claude to AMD GPUs in 3 days, undercutting CUDA's moat

Anthropic says AI is eroding Nvidia's CUDA lead, cutting an AMD chip switch from months to three days

Anthropic says its own model, Mythos, got Claude running on AMD GPUs in 3 days with almost no human intervention. The model ported or wrote nearly 100% of the kernels, measured on prompt processing on AMD MI355X. Adapting a new accelerator by conventional means takes 6 to 12 months.

Why it matters: Anthropic claims Mythos cut new-hardware adaptation from 6 to 12 months to 3 days, comparing model-written kernels with conventional engineering.