Anthropic says its AI model moved Claude onto AMD chips in three days

Anthropic told investors that its Mythos model got Claude running on AMD MI355X GPUs in about three days, with Mythos writing or porting nearly all the necessary kernels and, in co-founder Tom Brown's words, basically no human intervention. The timeline covers bringing up prompt processing for one Anthropic model at a useful performance level, not a full migration of Claude's training and operations. Anthropic says its compute architecture spans Nvidia GPUs, AMD GPUs, AWS Trainium and Google TPUs, treated as a shared capacity pool.