They won't, because they'd need an ARM architecture license.

Qualcomm have an architecture license and the Snapdragon X2 Elite Extreme X2E-96-100 isn't too far off the M5 Pro.

[1] https://browser.geekbench.com/processors/snapdragon-x2-elite...

[2] https://browser.geekbench.com/macs/macbook-pro-14-inch-2026-...

Why, the LLM can make up its own architecture.

The value lies in the design space exploration, which is what an LLM can easily do.

https://en.wikipedia.org/wiki/Design_space_exploration

Arm sells architecture licenses to anybody these days.

I mean you can design anything without a license. Selling it is where the problems come up. Even then there are likely places in China that would still make it for you.

Or they'll just build a competitor in RISC-V instead and that's fine.

Except the problem is not restricted to the actual ISA or its HDL implementation, etc.

It's even just getting space / time in a fab at that advanced of a process node.