At this point, the only reason why Anthropic has an advantage is laziness on the deciders' side (of which there is a lot) and, for non-coding work, the Claude harness is significantly better than most alternatives. For coding there are several model-agnostic alternatives on par or better than the frontier labs' own offerings. But arguably that is not yet true for office/document work.
Calculate the price to revenue ratio of all companies and select whichever ones have the best ratio.
For now it's Anthropic. But i don't see how they can maintain this leader position when other companies can provide similar services with models good enough for 90% use cases and at way lower cost.
Anthropic so far is doing a good job building and serving frontier models, they built a nice toolset around it (the web ui, desktop and cli apps ...) but the problem is to justify their IPO price and the huge investments when their moat is so thin