Cause they make the best coding model.

It's that simple. Everyone else is trying to compete in other ways and Anthropic are pushing for dominate the market.

They'll eventually lose their performance edge and suddenly they will back to being cute and fluffy

I've cancelled a clause sub, but still have one.

Agreed.

I've tried all of the models available right now, and Claude Opus is by far the most capable.

I had an assertion failure triggered in a fairly complex open-source C library I was using, and Claude Opus not only found the cause, but wrote a self-contained reproduction code I could add to a GitHub issue. And it also added tests for that issue, and fixed the underlying issue.

I am sincerely impressed by the capabilities of Claude Opus. Too bad its usage is so expensive.