Nearly two months after the viral success of China’s DeepSeek prompted a reckoning over how much tech companies spend to develop artificial intelligence systems, some leading AI firms are embracing a less-is-more approach.On Thursday, Toronto-based Cohere Inc. is set to announce a new model called Command A that can carry out complicated business tasks while running on just two of Nvidia Corp.’s AI-focused A100 or H100 chips. That’s significantly less than the number of chips required for some l...