Maybe it's not intentional but having two providers only making comparison between each other is still a bit fishy to me in such a competitive space.

> For example, Anthropic putting K3 in its comparisons would be a huge admission that K3 is worth considering.

They do put OpenAI though, if it would be a comparison only with their own models, why not I get it but a single other competitor?

It would be like Apple making comparison page with their new iPhone and only mentioning Samsung and nobody else for example, it would sound weird. You either include competitors or you do not and include none of them.