Anthropic Says Its AI Model Cut AMD Chip Switch to Three Days

Anthropic told investors ahead of its proposed IPO that its Mythos model wrote or ported nearly all the necessary kernels to get Claude running on AMD MI355X GPUs in about three days with basically no human intervention. The roughly three-day timeline covers bringing up prompt processing for one model at a useful performance level, not a full migration of Claude's training and operations. Anthropic says its architecture spans Nvidia GPUs, AMD GPUs, AWS Trainium and Google TPUs, treated as a shared compute pool.